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Adult Maths Sessions Addition and Subtraction methods.

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Presentation on theme: "Adult Maths Sessions Addition and Subtraction methods."— Presentation transcript:

1 Adult Maths Sessions Addition and Subtraction methods

2 Addition Mental methods come first!  Mental recall of number bonds  6 + 4 = 10   + 3 = 10  25 + 75 = 100  19 +  = 20  Use near doubles  6 + 7 = double 6 + 1 = 13

3 Addition- Reception and Y1

4 Addition- Year 2

5 Addition- Year 3 Moving into Year 3, children will begin to use larger numbers, using the number line method: 84 + 56 87 + 32 65 + 96 145 + 32

6 Addition- Year 3

7 Addition- Year 4 onwards

8 Subtraction Mental methods are the priority! Mental recall of subtraction facts: However teaching of this should demonstrate to the children the inverse of this is addition. 10 – 6 = 417 -  = 11 20 - 17 = 310 -  = 2 Find a small difference by counting up 82 – 79 = 3 Counting on or back in repeated steps of 1, 10, 100, 1000 86 - 52 = 34 (by counting back in tens and then in ones) 460 - 300 = 160 (by counting back in hundreds)

9 Subtraction- Reception & Yr 1

10 Subtraction- Year 2

11

12 Subtraction- Year 3

13 Subtraction- Year 4

14 Subtraction- Year 4 onwards Children should: be able to subtract numbers with different numbers of digits; be able to subtract two or more decimals with up to three digits and either one or two decimal places; know that decimal points should line up under each other. Be able to carry through 0‘s

15 Subtraction- Year 4 onwards Examples 2007 – 1938 5043 – 2855 0.43- 6.345 0.74 – 0.034


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