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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 545 · 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. 1.30 + 24 + 61 + 38 =
  2. 2.76 + 40 + 66 + 51 =
  3. 3.15 + 88 + 89 + 62 =
  4. 4.82 + 54 + 79 + 22 =
  5. 5.15 + 65 + 79 + 28 =
  6. 6.62 + 22 + 72 + 16 =
  7. 7.71 + 47 + 53 + 17 =
  8. 8.30 + 46 + 35 + 52 =
  9. 9.77 + 41 + 68 + 76 =
  10. 10.17 + 40 + 44 + 17 =
  11. 11.23 + 75 + 23 + 86 =
  12. 12.39 + 49 + 51 + 21 =
  13. 13.72 + 83 + 78 + 70 =
  14. 14.64 + 37 + 82 + 54 =
  15. 15.75 + 67 + 88 + 52 =
  16. 16.43 + 47 + 18 + 32 =
  17. 17.72 + 48 + 45 + 75 =
  18. 18.12 + 30 + 85 + 48 =
  19. 19.79 + 29 + 16 + 29 =
  20. 20.37 + 24 + 14 + 58 =
  21. 21.57 + 13 + 84 + 32 =
  22. 22.65 + 74 + 76 + 82 =
  23. 23.51 + 20 + 60 + 85 =
  24. 24.67 + 16 + 65 + 43 =
  25. 25.42 + 25 + 84 + 35 =
  26. 26.74 + 53 + 47 + 25 =
  27. 27.41 + 65 + 85 + 70 =
  28. 28.12 + 15 + 23 + 62 =
  29. 29.47 + 79 + 79 + 85 =
  30. 30.46 + 41 + 59 + 33 =
  31. 31.33 + 73 + 58 + 18 =
  32. 32.13 + 16 + 22 + 41 =
  33. 33.60 + 45 + 15 + 43 =
  34. 34.70 + 74 + 76 + 75 =
  35. 35.70 + 14 + 88 + 11 =
  36. 36.19 + 28 + 19 + 47 =
  37. 37.46 + 79 + 81 + 66 =
  38. 38.22 + 24 + 11 + 23 =
  39. 39.38 + 34 + 83 + 18 =
  40. 40.37 + 12 + 29 + 20 =

Answer key

  1. 153
  2. 233
  3. 254
  4. 237
  5. 187
  6. 172
  7. 188
  8. 163
  9. 262
  10. 118
  11. 207
  12. 160
  13. 303
  14. 237
  15. 282
  16. 140
  17. 240
  18. 175
  19. 153
  20. 133
  21. 186
  22. 297
  23. 216
  24. 191
  25. 186
  26. 199
  27. 261
  28. 112
  29. 290
  30. 179
  31. 182
  32. 92
  33. 163
  34. 295
  35. 183
  36. 113
  37. 272
  38. 80
  39. 173
  40. 98

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