Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Anti-clockwise

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd An anti-clockwise direction is the direction that is opposite of the way the hands of a clock turn, i.e., towards the left. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Backward

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd To move in a reverse direction. Example: Ari moves 4 steps backward to get to the tree.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Bar model

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A bar model can be used to represent a word problem. Example: There are 15 orange ribbons and 8 blue ribbons. How many ribbons are there altogether?

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Between

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: 17 is between 16 and 18.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Clockwise

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd The hands of a clock turn in a clockwise direction, i.e., towards the right. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Comparison model

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A comparison model is a type of bar model. It helps us compare two sets of objects. Example: Set B has 15 more than Set A.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Curved

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Not straight or flat. Example: Cones, cylinders and spheres have curved faces.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Edge

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd In a solid, an edge is formed when two faces meet. It can be curved or straight. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Estimate

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A reasonable guess of the actual number.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Even number

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd An even number has 0, 2, 4, 6 or 8 in the ones place.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Face

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd One part of a solid; it can be flat or curved. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Fraction

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A part of a whole that has been cut into equal parts. Example: The shaded part is of the circle. is a fraction.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Forward

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd To move ahead, towards the front. Example: Rita walks 2 steps forward to get to the tree.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Half turn

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: If Smarty makes a half turn either clockwise or anti-clockwise, he will face the television.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Hexagon

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A hexagon has 6 straight sides and 6 vertices. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Line of symmetry

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A line of symmetry cuts a shape into two halves that fit onto each other exactly when the shape is folded along the line. Example: line of symmetry

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Number line

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A line marked with numbers in increasing order from left to right. The markings on a number line are equally spaced. Each marking represents one number. Example: This is a number line that shows numbers from 0 to 10.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Odd number

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd An odd number has 1, 3, 5, 7 or 9 in the ones place.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd One eighth

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd When a whole has been divided into 8 equal parts, we say that each part is one eighth () of the whole. Example: whole of the whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd One fifth

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd When a whole has been divided into 5 equal parts, we say that each part is one fifth ( ) of the whole. Example: whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd One half

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd When a whole has been divided into 2 equal parts, we say that each part is one half ( ) of the whole. Example: whole of the whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd One quarter

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd When a whole has been divided into 4 equal parts, we say that each part is one quarter ( ) of the whole. Example: whole of the whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd One tenth

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd When a whole has been divided into 10 equal parts, we say that each part is one tenth ( ) of the whole. Example: whole of the whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd One third

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd When a whole has been divided into 3 equal parts, we say that each part is one third ( ) of the whole. Example: whole of the whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Ones

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: 23 ones = 23 We can say that the value of 23 ones is the same as 23.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Part-whole model

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A part-whole model is a type of bar model. Example: part + part = whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Pentagon

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A pentagon has 5 straight sides and 5 vertices. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Quarter turn

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: If Smarty makes a quarter turn clockwise, he will face the lamp. If he makes a quarter turn anti-clockwise, he will face the bookshelf.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Rectangular pyramid

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A rectangular pyramid has 5 flat faces (1 rectangular and 4 triangular). It also has 8 edges and 5 vertices. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Regroup

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd When we add the ones and get more than 9 ones, we need to regroup the ones into tens and ones. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Round (to the nearest ten)

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: 46 is closer to 50 than to 40. So, when we round 46 to the nearest ten, we get 50.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Semicircle

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A semicircle is half a circle. It has 1 curved side, 1 straight side and 2 vertices. Example: straight side

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Straight

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Not curved. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Symmetrical

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A figure is symmetrical if one half of the figure is a mirror image of the other. One side should fit exactly onto the other when folded in half. Example: This heart-shaped figure is a symmetrical figure.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Tens

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: 4 tens = 40 We can say that the value of 4 tens is the same as 40.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Tetrahedron

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A tetrahedron has 4 triangular faces, 6 edges and 4 vertices. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Unit fraction

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Unit fractions have the number 1 on the top. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Value

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: In the number 63, the digit 6 stands for 6 tens and it has a value of 60.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Vertex (Vertices)

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd A vertex is formed when 2 sides meet at a point. More than one vertex can be referred to as vertices. Example:

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Whole

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Examples: (a) 2 halves make 1 whole. (b) 4 quarters make 1 whole.

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Whole turn

Maths SMART Grade 2 © 2012 Alston Publishing House Pte Ltd Example: If Smarty makes a whole turn clockwise, he will still face the sofa.