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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 651 · 40 questions
TalentJR

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. 1.11 + 11 + 60 + 58 =
  2. 2.23 + 20 + 66 + 60 =
  3. 3.69 + 84 + 71 + 80 =
  4. 4.64 + 89 + 20 + 88 =
  5. 5.42 + 17 + 45 + 83 =
  6. 6.32 + 20 + 63 + 48 =
  7. 7.26 + 49 + 61 + 14 =
  8. 8.79 + 13 + 19 + 67 =
  9. 9.33 + 41 + 60 + 56 =
  10. 10.35 + 46 + 61 + 88 =
  11. 11.55 + 51 + 64 + 83 =
  12. 12.45 + 86 + 79 + 86 =
  13. 13.76 + 56 + 34 + 13 =
  14. 14.74 + 45 + 34 + 31 =
  15. 15.15 + 35 + 18 + 84 =
  16. 16.76 + 41 + 76 + 33 =
  17. 17.60 + 14 + 22 + 50 =
  18. 18.44 + 64 + 82 + 68 =
  19. 19.89 + 17 + 55 + 14 =
  20. 20.42 + 39 + 28 + 65 =
  21. 21.55 + 45 + 38 + 77 =
  22. 22.89 + 39 + 56 + 49 =
  23. 23.60 + 44 + 11 + 34 =
  24. 24.20 + 23 + 81 + 75 =
  25. 25.74 + 52 + 21 + 89 =
  26. 26.45 + 75 + 60 + 88 =
  27. 27.15 + 77 + 71 + 80 =
  28. 28.22 + 30 + 22 + 81 =
  29. 29.36 + 16 + 84 + 87 =
  30. 30.17 + 29 + 52 + 82 =
  31. 31.33 + 21 + 80 + 49 =
  32. 32.79 + 14 + 72 + 41 =
  33. 33.11 + 68 + 42 + 16 =
  34. 34.82 + 38 + 20 + 28 =
  35. 35.18 + 18 + 68 + 26 =
  36. 36.58 + 62 + 36 + 32 =
  37. 37.69 + 21 + 62 + 13 =
  38. 38.11 + 67 + 52 + 61 =
  39. 39.49 + 55 + 48 + 62 =
  40. 40.24 + 43 + 71 + 84 =

Answer key

  1. 140
  2. 169
  3. 304
  4. 261
  5. 187
  6. 163
  7. 150
  8. 178
  9. 190
  10. 230
  11. 253
  12. 296
  13. 179
  14. 184
  15. 152
  16. 226
  17. 146
  18. 258
  19. 175
  20. 174
  21. 215
  22. 233
  23. 149
  24. 199
  25. 236
  26. 268
  27. 243
  28. 155
  29. 223
  30. 180
  31. 183
  32. 206
  33. 137
  34. 168
  35. 130
  36. 188
  37. 165
  38. 191
  39. 214
  40. 222

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