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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
8-point compass
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
8-point compass
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Acute angle
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Acute angle Angles smaller than 90 are called acute angles. Example:
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Acute angle Angles smaller than 90 are called acute angles. Example:
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Approximately equal to ()
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Approximately equal to ()
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Approximately equal to ()
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Approximately equal to () The sign means ‘approximately equal to’. Example: 3468 3470 (when rounded to the nearest ten)
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Centre mark
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Centre mark
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Common factors
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Common factors Example: 1 and 2 are common factors of 6 and 10.
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Common factors Example: 1 and 2 are common factors of 6 and 10.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Common multiples
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Common multiples Example:
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Common multiples Example: 6, 12 and 18 are some common multiples of 2 and 3.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Coordinates
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Coordinates Example: The strawberry is located at the point (2, 4).
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Coordinates Example: The strawberry is located at the point (2, 4). The point (2, 4) is a pair of coordinates.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Coordinate grid
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Coordinate grid Example: This is a coordinate grid.
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Coordinate grid Example: This is a coordinate grid.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Degree ()
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Degree () We measure the size of an angle in degrees.
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Degree () We measure the size of an angle in degrees. We can also write for degree(s).
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
East
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
East
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Factors
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Factors The factors of a number are the numbers that it can be divided exactly by. Example: The factors of 40 are 1, 2, 4, 5, 8, 10, 20 and 40.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Heptagon
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Heptagon A heptagon has 7 straight sides and 7 vertices. Example:
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Heptagon A heptagon has 7 straight sides and 7 vertices. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Hundreds
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Hundreds Example: 2 hundreds = 200
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Hundreds Example: 2 hundreds = 200 We can say that the value of 2 hundreds is the same as 200.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Inner scale
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Inner scale
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Irregular polygon
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Irregular polygon An irregular polygon has sides and angles that are not all equal. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Multiples
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Multiples A multiple of a number is the product of that number and any number. A number is a factor of all its multiples. Example: 3, 6, 9 and 12 are the first four multiples of 3.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Net
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Net A figure which can be folded to form a solid is called the net of the solid. Example: This is a net of a cuboid.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-east
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-east
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-west
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-west
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Obtuse angle
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Obtuse angle Angles greater than 90 but smaller than 180 are called obtuse angles. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Octagon
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Octagon An octagon has 8 straight sides and 8 vertices. Example:
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Octagon An octagon has 8 straight sides and 8 vertices. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Origin
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Origin The pair of coordinates (0, 0) is called the origin.
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Origin The pair of coordinates (0, 0) is called the origin.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Outer scale
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Outer scale
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Polygon
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Polygon A polygon is a closed figure. Its sides are formed by straight lines that do not cross one another. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Prime numbers
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Prime numbers A prime number has only two factors, 1 and the number itself.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Product
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Product When we multiply numbers, the answer is called the product.
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Product When we multiply numbers, the answer is called the product.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Protractor
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Protractor We can find the size of an angle by measuring it with a protractor. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Quadrilateral
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Quadrilateral A quadrilateral has 4 straight sides and 4 vertices.
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Quadrilateral A quadrilateral has 4 straight sides and 4 vertices. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Quotient
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Quotient When we divide a number by another, the answer we get is called the quotient. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Regroup
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Regroup We need to regroup in a place value when
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Regroup We need to regroup in a place value when we get more than 9 after adding or multiplying; or we subtract a greater number from a smaller number; or we get a remainder in place values other than the ones place when dividing
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Regular polygon
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Regular polygon A regular polygon has all equal sides and all equal angles. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Remainder
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Remainder Remainder is the amount that is left over when a number is divided by another number. Example:
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Right angle
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Right angle A right angle is 90. Example:
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Right angle A right angle is 90. Example:
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Round to the nearest hundred
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Round to the nearest hundred
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Round to the nearest hundred
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Round to the nearest hundred When we round a number to the nearest hundred, we look at the digit in the tens place. If the digit < 5, we round it to the smaller hundred. If the digit > 5, we round it to the bigger hundred. If the digit = 5, we round it to the bigger hundred.
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Round to the nearest thousand
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Round to the nearest thousand
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Round to the nearest thousand
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Round to the nearest thousand When we round a number to the nearest thousand, we look at the digit in the hundreds place. If the digit < 5, we round it to the smaller thousand. If the digit > 5, we round it to the bigger thousand. If the digit = 5, we round it to the bigger thousand.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-east
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-east
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-west
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-west
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Thousands
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Thousands Example: 5 thousands = 5000
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Thousands Example: 5 thousands = 5000 We can say that the value of 5 thousands is the same as 5000.
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Unit
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Unit Each in a bar model stands for 1 unit. Example: 1 unit 29
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Unit Each in a bar model stands for 1 unit. Example: 1 unit 29 5 units 29 × 5 = 145
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
West
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
West
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-axis
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-axis
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-coordinate
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-coordinate
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-axis
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-axis
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-coordinate
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-coordinate
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Zero line
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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Zero line
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