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
- 1.51 + 47 + 76 + 67 =
- 2.73 + 52 + 59 + 51 =
- 3.58 + 74 + 48 + 34 =
- 4.45 + 73 + 11 + 73 =
- 5.35 + 14 + 70 + 18 =
- 6.26 + 59 + 86 + 45 =
- 7.69 + 71 + 43 + 19 =
- 8.34 + 12 + 28 + 49 =
- 9.71 + 28 + 61 + 79 =
- 10.82 + 70 + 16 + 78 =
- 11.26 + 34 + 11 + 83 =
- 12.19 + 80 + 79 + 60 =
- 13.27 + 22 + 61 + 24 =
- 14.48 + 40 + 18 + 35 =
- 15.27 + 17 + 22 + 15 =
- 16.27 + 75 + 20 + 30 =
- 17.89 + 24 + 65 + 21 =
- 18.51 + 59 + 77 + 63 =
- 19.14 + 33 + 76 + 32 =
- 20.16 + 64 + 36 + 30 =
- 21.60 + 47 + 69 + 73 =
- 22.22 + 84 + 21 + 38 =
- 23.24 + 47 + 68 + 12 =
- 24.32 + 59 + 81 + 30 =
- 25.11 + 63 + 73 + 47 =
- 26.16 + 11 + 57 + 11 =
- 27.16 + 61 + 56 + 31 =
- 28.47 + 77 + 76 + 63 =
- 29.88 + 32 + 88 + 86 =
- 30.19 + 69 + 82 + 49 =
- 31.80 + 59 + 68 + 89 =
- 32.16 + 67 + 69 + 59 =
- 33.68 + 89 + 57 + 40 =
- 34.53 + 34 + 71 + 18 =
- 35.26 + 25 + 80 + 16 =
- 36.32 + 47 + 64 + 16 =
- 37.18 + 60 + 49 + 51 =
- 38.39 + 82 + 55 + 28 =
- 39.76 + 44 + 29 + 22 =
- 40.14 + 69 + 43 + 57 =
Answer key
- 241
- 235
- 214
- 202
- 137
- 216
- 202
- 123
- 239
- 246
- 154
- 238
- 134
- 141
- 81
- 152
- 199
- 250
- 155
- 146
- 249
- 165
- 151
- 202
- 194
- 95
- 164
- 263
- 294
- 219
- 296
- 211
- 254
- 176
- 147
- 159
- 178
- 204
- 171
- 183
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths