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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 422 · 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. 1.40 + 59 + 62 + 76 =
  2. 2.29 + 80 + 23 + 56 =
  3. 3.25 + 38 + 61 + 66 =
  4. 4.25 + 29 + 83 + 25 =
  5. 5.49 + 54 + 12 + 44 =
  6. 6.67 + 66 + 36 + 35 =
  7. 7.51 + 55 + 17 + 89 =
  8. 8.60 + 71 + 23 + 76 =
  9. 9.35 + 70 + 72 + 41 =
  10. 10.58 + 13 + 23 + 34 =
  11. 11.28 + 71 + 86 + 36 =
  12. 12.57 + 38 + 14 + 12 =
  13. 13.12 + 32 + 66 + 31 =
  14. 14.85 + 12 + 42 + 15 =
  15. 15.24 + 86 + 82 + 60 =
  16. 16.74 + 87 + 21 + 18 =
  17. 17.86 + 84 + 42 + 49 =
  18. 18.38 + 40 + 73 + 78 =
  19. 19.38 + 59 + 18 + 71 =
  20. 20.17 + 62 + 65 + 62 =
  21. 21.23 + 16 + 89 + 12 =
  22. 22.59 + 19 + 25 + 42 =
  23. 23.68 + 86 + 60 + 54 =
  24. 24.81 + 14 + 63 + 53 =
  25. 25.62 + 70 + 14 + 76 =
  26. 26.15 + 20 + 15 + 33 =
  27. 27.59 + 61 + 68 + 78 =
  28. 28.12 + 48 + 38 + 55 =
  29. 29.53 + 74 + 14 + 57 =
  30. 30.12 + 83 + 15 + 74 =
  31. 31.73 + 74 + 46 + 55 =
  32. 32.47 + 32 + 25 + 22 =
  33. 33.11 + 22 + 45 + 68 =
  34. 34.50 + 16 + 62 + 32 =
  35. 35.61 + 50 + 43 + 66 =
  36. 36.85 + 78 + 30 + 88 =
  37. 37.66 + 52 + 56 + 65 =
  38. 38.30 + 32 + 34 + 33 =
  39. 39.56 + 57 + 60 + 62 =
  40. 40.77 + 49 + 50 + 28 =

Answer key

  1. 237
  2. 188
  3. 190
  4. 162
  5. 159
  6. 204
  7. 212
  8. 230
  9. 218
  10. 128
  11. 221
  12. 121
  13. 141
  14. 154
  15. 252
  16. 200
  17. 261
  18. 229
  19. 186
  20. 206
  21. 140
  22. 145
  23. 268
  24. 211
  25. 222
  26. 83
  27. 266
  28. 153
  29. 198
  30. 184
  31. 248
  32. 126
  33. 146
  34. 160
  35. 220
  36. 281
  37. 239
  38. 129
  39. 235
  40. 204

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