learnbits.app

Addition with tens and ones

You learn to add tens and ones: first the tens, then the ones.

Practise thisWhiteboardMake it a quiz

How to work it out

  1. Split the second number into tens and ones.
  2. Add the tens first.
  3. Then add the ones.
JumpingJump along the number line
SplittingTens and ones apart

56 + 28

  1. Partition 28 into 20 and 8.
  2. Add the tens: 56 + 20 = 76.
  3. Add the ones: 76 + 8 = 84.
More examples

45 + 27

  1. Partition 27 into 20 and 7.
  2. Add the tens: 45 + 20 = 65.
  3. Add the ones: 65 + 7 = 72.

36 + 47

  1. Partition 47 into 40 and 7.
  2. Add the tens: 36 + 40 = 76.
  3. Add the ones: 76 + 7 = 83.