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Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd

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1 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
8-point compass

2 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
8-point compass

3 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Acute angle

4 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:

5 Approximately equal to ()
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Approximately equal to ()

6 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)

7 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Centre mark

8 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Centre mark

9 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Common factors

10 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.

11 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Common multiples

12 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.

13 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Coordinates

14 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.

15 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Coordinate grid

16 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.

17 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Degree ()

18 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).

19 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
East

20 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
East

21 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Factors

22 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.

23 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Heptagon

24 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:

25 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Hundreds

26 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.

27 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Inner scale

28 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Inner scale

29 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Irregular polygon

30 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:

31 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Multiples

32 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.

33 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Net

34 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.

35 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North

36 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North

37 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-east

38 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-east

39 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-west

40 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
North-west

41 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Obtuse angle

42 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:

43 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Octagon

44 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:

45 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Origin

46 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.

47 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Outer scale

48 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Outer scale

49 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Polygon

50 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:

51 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Prime numbers

52 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Prime numbers A prime number has only two factors, 1 and the number itself.

53 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Product

54 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.

55 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Protractor

56 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:

57 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Quadrilateral

58 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:

59 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Quotient

60 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:

61 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Regroup

62 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

63 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Regular polygon

64 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Regular polygon A regular polygon has all equal sides and all equal angles. Example:

65 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Remainder

66 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:

67 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Right angle

68 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:

69 Round to the nearest hundred
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Round to the nearest hundred

70 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.

71 Round to the nearest thousand
Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd Round to the nearest thousand

72 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.

73 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South

74 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South

75 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-east

76 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-east

77 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-west

78 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
South-west

79 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Thousands

80 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.

81 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Unit

82 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

83 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
West

84 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
West

85 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-axis

86 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-axis

87 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-coordinate

88 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
X-coordinate

89 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-axis

90 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-axis

91 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-coordinate

92 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Y-coordinate

93 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Zero line

94 Maths Smart Grade 4 © 2012 Alston Publishing House Pte Ltd
Zero line


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