Mental Addition Worksheet
The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.
NameDateTime takenScore ___ / 40
- 1.79 + 75 + 52 + 22 =
- 2.39 + 33 + 23 + 43 =
- 3.62 + 44 + 73 + 86 =
- 4.69 + 14 + 24 + 76 =
- 5.74 + 77 + 46 + 59 =
- 6.20 + 78 + 35 + 68 =
- 7.61 + 40 + 11 + 63 =
- 8.75 + 66 + 86 + 38 =
- 9.86 + 57 + 33 + 49 =
- 10.55 + 79 + 31 + 33 =
- 11.23 + 63 + 38 + 13 =
- 12.28 + 16 + 70 + 14 =
- 13.70 + 49 + 68 + 31 =
- 14.12 + 71 + 62 + 69 =
- 15.52 + 54 + 53 + 16 =
- 16.43 + 38 + 13 + 73 =
- 17.45 + 49 + 74 + 23 =
- 18.82 + 21 + 54 + 14 =
- 19.72 + 19 + 78 + 21 =
- 20.88 + 63 + 21 + 68 =
- 21.43 + 37 + 39 + 19 =
- 22.20 + 44 + 11 + 25 =
- 23.87 + 52 + 17 + 59 =
- 24.58 + 35 + 77 + 23 =
- 25.63 + 30 + 37 + 17 =
- 26.45 + 13 + 65 + 14 =
- 27.31 + 89 + 23 + 26 =
- 28.11 + 76 + 43 + 64 =
- 29.23 + 17 + 23 + 69 =
- 30.85 + 71 + 21 + 21 =
- 31.73 + 82 + 71 + 15 =
- 32.89 + 73 + 31 + 19 =
- 33.81 + 63 + 50 + 35 =
- 34.50 + 64 + 28 + 19 =
- 35.13 + 18 + 29 + 73 =
- 36.81 + 60 + 33 + 61 =
- 37.55 + 22 + 32 + 20 =
- 38.39 + 31 + 83 + 72 =
- 39.82 + 30 + 24 + 65 =
- 40.23 + 20 + 84 + 55 =
Answer key
- 228
- 138
- 265
- 183
- 256
- 201
- 175
- 265
- 225
- 198
- 137
- 128
- 218
- 214
- 175
- 167
- 191
- 171
- 190
- 240
- 138
- 100
- 215
- 193
- 147
- 137
- 169
- 194
- 132
- 198
- 241
- 212
- 229
- 161
- 133
- 235
- 129
- 225
- 201
- 182
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths