Number chains (mixed)
In a mixed number chain the child adds and subtracts in order, carrying each result into the next step: 36 + 8 = 44, then 44 − 4 = 40. Longer chains train mental math and concentration within 100.
How to solve this
- A mixed calculation chain uses both addition and subtraction — keep track of the running total at each step.
- Work from left to right and jot down each intermediate result; never skip ahead.
- Check by working right to left using inverse operations — you must arrive back at the starting number.
Examples
40 + 20 - 10 = ?
50
36 + 8 - 4 = ?
40
Practice problems with answers
Solve these problems on paper or out loud, then check the answer key. The online practice and the printable worksheet give a new set every time.
- 21 - 16 + 19 - 6 = ___
- 35 + 10 + 10 + 9 + 12 + 4 = ___
- 41 - 13 + 17 - 1 - 6 = ___
- 67 - 16 + 7 + 9 + 7 + 12 = ___
- 56 + 6 + 12 - 16 + 14 = ___
- 76 - 7 - 15 - 6 - 16 - 18 = ___
- 39 + 7 + 9 + 10 = ___
- 77 - 10 - 11 - 8 = ___
Show answers
- 18
- 80
- 38
- 86
- 72
- 14
- 65
- 48