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
- 1.84 + 63 + 11 + 38 =
- 2.34 + 24 + 18 + 17 =
- 3.55 + 27 + 78 + 59 =
- 4.87 + 85 + 26 + 27 =
- 5.48 + 38 + 12 + 40 =
- 6.21 + 65 + 75 + 53 =
- 7.69 + 49 + 39 + 65 =
- 8.76 + 37 + 13 + 59 =
- 9.88 + 11 + 70 + 85 =
- 10.58 + 73 + 24 + 80 =
- 11.38 + 27 + 14 + 53 =
- 12.50 + 51 + 65 + 80 =
- 13.81 + 16 + 54 + 77 =
- 14.66 + 11 + 71 + 14 =
- 15.42 + 44 + 31 + 82 =
- 16.11 + 19 + 70 + 18 =
- 17.11 + 21 + 24 + 51 =
- 18.37 + 56 + 73 + 50 =
- 19.86 + 35 + 32 + 12 =
- 20.71 + 24 + 14 + 76 =
- 21.30 + 44 + 55 + 58 =
- 22.88 + 73 + 69 + 84 =
- 23.39 + 82 + 76 + 47 =
- 24.28 + 40 + 64 + 78 =
- 25.33 + 22 + 59 + 83 =
- 26.87 + 89 + 45 + 25 =
- 27.24 + 70 + 30 + 81 =
- 28.62 + 81 + 12 + 53 =
- 29.29 + 79 + 66 + 47 =
- 30.72 + 69 + 24 + 63 =
- 31.46 + 35 + 89 + 52 =
- 32.33 + 63 + 26 + 88 =
- 33.43 + 44 + 74 + 11 =
- 34.21 + 62 + 72 + 61 =
- 35.63 + 41 + 88 + 19 =
- 36.85 + 15 + 29 + 62 =
- 37.72 + 36 + 82 + 69 =
- 38.51 + 53 + 74 + 84 =
- 39.15 + 15 + 52 + 43 =
- 40.36 + 80 + 68 + 26 =
Answer key
- 196
- 93
- 219
- 225
- 138
- 214
- 222
- 185
- 254
- 235
- 132
- 246
- 228
- 162
- 199
- 118
- 107
- 216
- 165
- 185
- 187
- 314
- 244
- 210
- 197
- 246
- 205
- 208
- 221
- 228
- 222
- 210
- 172
- 216
- 211
- 191
- 259
- 262
- 125
- 210
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths