Subtraction by Counting Up Worksheet
How to do it in your head (Count up): Start at the smaller number. Jump to the next ten, then the next hundred, then to the bigger number. Add up all the jumps.
NameDateTime takenScore ___ / 40
- 1.61 − 30 =
- 2.218 − 193 =
- 3.504 − 486 =
- 4.76 − 47 =
- 5.201 − 193 =
- 6.1002 − 991 =
- 7.56 − 38 =
- 8.84 − 74 =
- 9.53 − 30 =
- 10.129 − 75 =
- 11.512 − 490 =
- 12.309 − 285 =
- 13.111 − 96 =
- 14.313 − 289 =
- 15.312 − 281 =
- 16.510 − 496 =
- 17.1021 − 989 =
- 18.53 − 44 =
- 19.52 − 43 =
- 20.106 − 94 =
- 21.1004 − 995 =
- 22.509 − 477 =
- 23.511 − 490 =
- 24.101 − 98 =
- 25.330 − 283 =
- 26.317 − 279 =
- 27.100 − 58 =
- 28.208 − 177 =
- 29.220 − 194 =
- 30.223 − 193 =
- 31.130 − 87 =
- 32.1001 − 990 =
- 33.82 − 61 =
- 34.70 − 47 =
- 35.67 − 46 =
- 36.1008 − 997 =
- 37.72 − 36 =
- 38.221 − 188 =
- 39.117 − 97 =
- 40.217 − 180 =
Answer key
- 31
- 25
- 18
- 29
- 8
- 11
- 18
- 10
- 23
- 54
- 22
- 24
- 15
- 24
- 31
- 14
- 32
- 9
- 9
- 12
- 9
- 32
- 21
- 3
- 47
- 38
- 42
- 31
- 26
- 30
- 43
- 11
- 21
- 23
- 21
- 11
- 36
- 33
- 20
- 37
Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths