Subtraction


Year 1          Subtract from numbers up to 20

Children consolidate understanding of subtraction practically, showing subtraction on bead strings, using cubes etc. and in familiar contexts, and are introduced to more formal recording using number lines as below:











Mental subtraction

Children should start recalling subtraction facts up to and within 10 and 20, and should be able to subtract zero.


Key vocabulary: equal to, take, take away, less, minus, subtract, leaves, distance between, how many more, how many fewer / less than, most, least, count back, how many left, how much less is_?


Key skills for subtraction at Y1:


Year 2    Subtract with 2-digit numbers

Subtract on a number line by counting back, aiming to develop mental subtraction skills.


This strategy will be used for:

  1. 2-digit numbers , subtract units (by taking away / counting back) e.g. 36 - 7
  2. 2-digit numbers , subtract tens (by taking away / counting back) e.g. 48 - 30
  3. Subtracting pairs of 2-digit numbers (see below)















Key vocabulary: equal to, take, take away, less, minus, subtract, leaves, distance between, how many more, how many fewer / less than, most, least, count back, how many left, how much less is_? difference, count on, strategy, partition, tens, units


Key skills for subtraction at Y2:


Mental

1  2  3  4  5  6  7  8  9  10  11  12

Subtract by taking away

Find the ‘distance between’