Maths - Y2 - Mount Pleasant Infant School

Maths – Y2

Number and Place Value

In Year 2 children focus on reinforcing their understanding and use of 2 digit numbers. They should be able to read any 2 digit number and partition them into different combinations of tens and ones. Children explain what they know about numbers verbally or using pictures and representations. They can compare and order numbers with confidence.

Children will be expected to explain what they know about a number using accurate mathematical vocabulary. They will problem solve and reason using their knowledge.

Key Vocabulary
tens	ones	less than	greater than

Number and Place Value

Before children start Year 2 they should be able to fluently recall addition and subtraction facts within 10.

Count forwards and backwards in multiples of 2, 5 and 10s.

In Year 2 they will learn to recall multiplication facts and corresponding division facts in the 10, 5, and 2 timetables. Count forwards and backwards in multiples of 3.

Addition and Subtraction

Before children start Year 2 they should be able to recall all their number bonds of 10 and be able to add and subtract within 20.

In Year 2 , children need to be able to add and subtract 2 digit numbers using an efficient method. This could be using a written method, drawing pictures or using concrete resources. Children will also recall all number bonds to10 and use these to calculate number bonds to 20.

Addition Methods

Strategies for addition	Example
Adding with concrete objects and pictures	The children would physically have the dienes or counters before using pictures, including drawing their own dienes.
Filled in number line	In Year 2, we would expect the children to be able to add the 10s and then the 1s. Some may be able to do 1 jump of 3 and some may need to do 3 jumps of 1.
Using known facts (including number bonds to 10, doubles and near doubles)	4 + 6 = 10 So…. 14 + 6 = 20 6 + 4 = 10 16 + 4 = 20 40 + 60 = 100 6 + 7 = 13 The children should know 6 + 6 is 12 and see that 7 is 1 more than 6, so the answer will be 1 more, 13.
Empty line	The children will draw the number line and write their starting number (as they are adding they will start on the left and jump forwards). They will need to make sure they draw the jumps, what the jumps represent and the numbers. Some may be able to do 1 jump of 3 and some may need to do 3 jumps of 1.
Adding by exchanging 10 ones for 1 ten	Children to see that 38 + 5 = 40 + 3 by combining 10 ones and exchanging for 1 ten.
Bridging	17 + 5 = 22. Using the number line you can show that you add 3 to 17 to make 20 and then add 2 more to make 22. The children need to be secure with number bonds of 10 and be able to confidently partition numbers below 10 to be able to do this.

Subtraction Methods

Strategies for subtraction	Example
Subtracting by taking away from a group	The children would have objects to then be able to physically remove some. 38 – 12 =
Filled in number line	In Year 2, we would expect the children to be able to subtract the 10s and then the 1s. Most children will be able to do 1 jump of 6 and some may need to do 6 jumps of 1.
Using known facts (including number bonds to 10, doubles and near doubles)	4 + 6 = 10 So…. 10 – 4 = 6 10 – 6 = 4 100 – 60 = 40 100 – 40 = 60 11- 4 = 7. The children should know that 11 is 1 more than 10 but they are taking away the same amount, so the answer will be 1 more, 7. 12 – 6 = 6 The children should know 6 + 6 = 12 so 12 – 6 will be 6.