Addition: two-digit and two-digit numbers

Spine 1: Number, Addition and Subtraction – Topic 1.15

Primary KS1 Year 2
Mastery PD Materials


Build on segments 1.13 and 1.14 to equip children with useful strategies for addition of two or more two-digit numbers, partitioning two-digit numbers into tens and ones before calculation.

Teaching points

  • Teaching point 1: Known strategies can be combined to add two multiples of ten to two single-digit numbers.
  • Teaching point 2: Two two-digit numbers can be added by partitioning one or both of them into tens and ones.