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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 355 · 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. 1.18 + 28 + 68 + 14 =
  2. 2.78 + 45 + 80 + 68 =
  3. 3.51 + 81 + 84 + 20 =
  4. 4.78 + 87 + 48 + 74 =
  5. 5.55 + 84 + 24 + 33 =
  6. 6.34 + 83 + 24 + 75 =
  7. 7.72 + 29 + 32 + 33 =
  8. 8.83 + 20 + 14 + 66 =
  9. 9.32 + 20 + 43 + 78 =
  10. 10.41 + 41 + 16 + 48 =
  11. 11.71 + 83 + 34 + 31 =
  12. 12.17 + 30 + 44 + 35 =
  13. 13.50 + 31 + 54 + 25 =
  14. 14.14 + 16 + 70 + 15 =
  15. 15.34 + 49 + 19 + 40 =
  16. 16.85 + 13 + 40 + 28 =
  17. 17.80 + 12 + 33 + 28 =
  18. 18.39 + 63 + 83 + 36 =
  19. 19.62 + 15 + 44 + 73 =
  20. 20.72 + 67 + 76 + 43 =
  21. 21.39 + 77 + 16 + 50 =
  22. 22.13 + 39 + 13 + 69 =
  23. 23.36 + 14 + 87 + 59 =
  24. 24.68 + 76 + 49 + 78 =
  25. 25.80 + 46 + 74 + 88 =
  26. 26.71 + 77 + 49 + 31 =
  27. 27.15 + 32 + 71 + 36 =
  28. 28.20 + 88 + 28 + 79 =
  29. 29.69 + 72 + 46 + 53 =
  30. 30.62 + 81 + 88 + 68 =
  31. 31.82 + 22 + 74 + 18 =
  32. 32.22 + 32 + 50 + 62 =
  33. 33.37 + 72 + 67 + 70 =
  34. 34.19 + 22 + 42 + 32 =
  35. 35.24 + 72 + 17 + 74 =
  36. 36.18 + 86 + 24 + 44 =
  37. 37.42 + 15 + 44 + 20 =
  38. 38.56 + 21 + 78 + 34 =
  39. 39.77 + 23 + 86 + 58 =
  40. 40.78 + 39 + 62 + 26 =

Answer key

  1. 128
  2. 271
  3. 236
  4. 287
  5. 196
  6. 216
  7. 166
  8. 183
  9. 173
  10. 146
  11. 219
  12. 126
  13. 160
  14. 115
  15. 142
  16. 166
  17. 153
  18. 221
  19. 194
  20. 258
  21. 182
  22. 134
  23. 196
  24. 271
  25. 288
  26. 228
  27. 154
  28. 215
  29. 240
  30. 299
  31. 196
  32. 166
  33. 246
  34. 115
  35. 187
  36. 172
  37. 121
  38. 189
  39. 244
  40. 205

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