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
- 1.26 + 55 + 79 + 30 =
- 2.88 + 17 + 48 + 32 =
- 3.74 + 26 + 16 + 19 =
- 4.68 + 89 + 89 + 68 =
- 5.31 + 69 + 49 + 84 =
- 6.71 + 78 + 88 + 33 =
- 7.85 + 75 + 37 + 76 =
- 8.56 + 88 + 74 + 66 =
- 9.84 + 19 + 22 + 12 =
- 10.71 + 79 + 86 + 13 =
- 11.81 + 59 + 34 + 28 =
- 12.15 + 29 + 19 + 22 =
- 13.80 + 67 + 76 + 23 =
- 14.64 + 40 + 86 + 75 =
- 15.89 + 52 + 40 + 67 =
- 16.47 + 21 + 44 + 82 =
- 17.89 + 84 + 57 + 57 =
- 18.68 + 20 + 40 + 74 =
- 19.14 + 13 + 54 + 63 =
- 20.69 + 83 + 53 + 19 =
- 21.52 + 64 + 28 + 14 =
- 22.68 + 51 + 41 + 67 =
- 23.44 + 75 + 11 + 74 =
- 24.49 + 47 + 88 + 38 =
- 25.71 + 52 + 19 + 14 =
- 26.46 + 41 + 68 + 17 =
- 27.73 + 25 + 17 + 13 =
- 28.38 + 87 + 21 + 52 =
- 29.82 + 20 + 45 + 52 =
- 30.85 + 51 + 55 + 29 =
- 31.78 + 33 + 43 + 35 =
- 32.38 + 21 + 43 + 61 =
- 33.33 + 24 + 17 + 33 =
- 34.50 + 42 + 84 + 34 =
- 35.68 + 88 + 51 + 83 =
- 36.72 + 20 + 28 + 77 =
- 37.48 + 73 + 44 + 71 =
- 38.53 + 16 + 61 + 89 =
- 39.88 + 41 + 83 + 86 =
- 40.53 + 52 + 36 + 81 =
Answer key
- 190
- 185
- 135
- 314
- 233
- 270
- 273
- 284
- 137
- 249
- 202
- 85
- 246
- 265
- 248
- 194
- 287
- 202
- 144
- 224
- 158
- 227
- 204
- 222
- 156
- 172
- 128
- 198
- 199
- 220
- 189
- 163
- 107
- 210
- 290
- 197
- 236
- 219
- 298
- 222
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths