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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 653 · 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. 1.24 + 70 + 38 + 46 =
  2. 2.78 + 33 + 59 + 32 =
  3. 3.58 + 33 + 82 + 42 =
  4. 4.83 + 41 + 42 + 32 =
  5. 5.59 + 56 + 77 + 65 =
  6. 6.26 + 70 + 82 + 42 =
  7. 7.33 + 33 + 62 + 28 =
  8. 8.16 + 64 + 82 + 43 =
  9. 9.17 + 34 + 54 + 88 =
  10. 10.35 + 42 + 28 + 62 =
  11. 11.63 + 12 + 38 + 74 =
  12. 12.86 + 58 + 78 + 66 =
  13. 13.68 + 50 + 25 + 81 =
  14. 14.81 + 82 + 38 + 49 =
  15. 15.12 + 24 + 72 + 81 =
  16. 16.81 + 30 + 32 + 69 =
  17. 17.86 + 69 + 70 + 40 =
  18. 18.13 + 85 + 64 + 25 =
  19. 19.59 + 54 + 13 + 71 =
  20. 20.59 + 77 + 22 + 44 =
  21. 21.29 + 85 + 22 + 16 =
  22. 22.32 + 72 + 28 + 41 =
  23. 23.33 + 88 + 24 + 55 =
  24. 24.40 + 66 + 84 + 50 =
  25. 25.67 + 16 + 22 + 40 =
  26. 26.73 + 20 + 83 + 39 =
  27. 27.19 + 29 + 16 + 21 =
  28. 28.63 + 74 + 46 + 13 =
  29. 29.44 + 56 + 65 + 62 =
  30. 30.30 + 44 + 54 + 64 =
  31. 31.62 + 56 + 13 + 27 =
  32. 32.24 + 80 + 54 + 45 =
  33. 33.25 + 62 + 52 + 24 =
  34. 34.32 + 37 + 58 + 43 =
  35. 35.24 + 33 + 68 + 62 =
  36. 36.26 + 40 + 80 + 80 =
  37. 37.69 + 46 + 83 + 72 =
  38. 38.26 + 89 + 56 + 38 =
  39. 39.31 + 23 + 15 + 28 =
  40. 40.49 + 20 + 48 + 60 =

Answer key

  1. 178
  2. 202
  3. 215
  4. 198
  5. 257
  6. 220
  7. 156
  8. 205
  9. 193
  10. 167
  11. 187
  12. 288
  13. 224
  14. 250
  15. 189
  16. 212
  17. 265
  18. 187
  19. 197
  20. 202
  21. 152
  22. 173
  23. 200
  24. 240
  25. 145
  26. 215
  27. 85
  28. 196
  29. 227
  30. 192
  31. 158
  32. 203
  33. 163
  34. 170
  35. 187
  36. 226
  37. 270
  38. 209
  39. 97
  40. 177

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