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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 36 · 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. 1.86 + 85 + 46 + 86 =
  2. 2.58 + 67 + 56 + 18 =
  3. 3.47 + 22 + 19 + 78 =
  4. 4.15 + 35 + 86 + 45 =
  5. 5.12 + 17 + 54 + 26 =
  6. 6.13 + 31 + 78 + 80 =
  7. 7.58 + 69 + 83 + 12 =
  8. 8.20 + 18 + 80 + 34 =
  9. 9.68 + 84 + 49 + 80 =
  10. 10.27 + 74 + 24 + 83 =
  11. 11.58 + 79 + 57 + 30 =
  12. 12.53 + 11 + 45 + 89 =
  13. 13.89 + 28 + 55 + 85 =
  14. 14.21 + 15 + 36 + 70 =
  15. 15.55 + 57 + 35 + 18 =
  16. 16.54 + 21 + 31 + 60 =
  17. 17.84 + 79 + 79 + 84 =
  18. 18.31 + 67 + 30 + 11 =
  19. 19.42 + 86 + 48 + 43 =
  20. 20.39 + 32 + 57 + 12 =
  21. 21.54 + 18 + 59 + 76 =
  22. 22.37 + 57 + 77 + 38 =
  23. 23.89 + 79 + 69 + 86 =
  24. 24.64 + 42 + 87 + 85 =
  25. 25.82 + 35 + 76 + 40 =
  26. 26.38 + 88 + 68 + 20 =
  27. 27.73 + 74 + 14 + 20 =
  28. 28.33 + 33 + 72 + 54 =
  29. 29.57 + 30 + 58 + 49 =
  30. 30.59 + 44 + 33 + 55 =
  31. 31.63 + 11 + 38 + 49 =
  32. 32.58 + 50 + 71 + 19 =
  33. 33.43 + 39 + 35 + 72 =
  34. 34.86 + 41 + 58 + 24 =
  35. 35.75 + 86 + 82 + 78 =
  36. 36.52 + 61 + 34 + 59 =
  37. 37.78 + 34 + 34 + 48 =
  38. 38.15 + 78 + 50 + 67 =
  39. 39.38 + 58 + 36 + 32 =
  40. 40.13 + 47 + 76 + 63 =

Answer key

  1. 303
  2. 199
  3. 166
  4. 181
  5. 109
  6. 202
  7. 222
  8. 152
  9. 281
  10. 208
  11. 224
  12. 198
  13. 257
  14. 142
  15. 165
  16. 166
  17. 326
  18. 139
  19. 219
  20. 140
  21. 207
  22. 209
  23. 323
  24. 278
  25. 233
  26. 214
  27. 181
  28. 192
  29. 194
  30. 191
  31. 161
  32. 198
  33. 189
  34. 209
  35. 321
  36. 206
  37. 194
  38. 210
  39. 164
  40. 199

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