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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 718 · 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. 1.74 + 50 + 60 + 80 =
  2. 2.13 + 71 + 82 + 84 =
  3. 3.80 + 15 + 63 + 27 =
  4. 4.40 + 17 + 88 + 61 =
  5. 5.86 + 83 + 34 + 82 =
  6. 6.21 + 83 + 63 + 45 =
  7. 7.58 + 28 + 11 + 36 =
  8. 8.56 + 42 + 26 + 13 =
  9. 9.69 + 32 + 41 + 63 =
  10. 10.40 + 54 + 61 + 89 =
  11. 11.24 + 74 + 28 + 59 =
  12. 12.16 + 26 + 35 + 21 =
  13. 13.51 + 72 + 21 + 26 =
  14. 14.11 + 31 + 43 + 67 =
  15. 15.54 + 71 + 20 + 57 =
  16. 16.69 + 63 + 88 + 59 =
  17. 17.84 + 69 + 66 + 35 =
  18. 18.82 + 28 + 76 + 12 =
  19. 19.51 + 87 + 49 + 26 =
  20. 20.18 + 13 + 22 + 24 =
  21. 21.22 + 77 + 86 + 26 =
  22. 22.26 + 24 + 79 + 62 =
  23. 23.30 + 79 + 53 + 70 =
  24. 24.18 + 75 + 78 + 65 =
  25. 25.14 + 55 + 60 + 70 =
  26. 26.83 + 25 + 39 + 23 =
  27. 27.39 + 56 + 19 + 86 =
  28. 28.16 + 18 + 48 + 50 =
  29. 29.36 + 73 + 17 + 34 =
  30. 30.86 + 48 + 72 + 35 =
  31. 31.28 + 89 + 36 + 42 =
  32. 32.22 + 27 + 17 + 72 =
  33. 33.79 + 71 + 61 + 56 =
  34. 34.83 + 20 + 74 + 64 =
  35. 35.11 + 84 + 29 + 15 =
  36. 36.55 + 31 + 57 + 56 =
  37. 37.47 + 88 + 52 + 31 =
  38. 38.73 + 52 + 62 + 21 =
  39. 39.72 + 14 + 12 + 45 =
  40. 40.14 + 68 + 11 + 44 =

Answer key

  1. 264
  2. 250
  3. 185
  4. 206
  5. 285
  6. 212
  7. 133
  8. 137
  9. 205
  10. 244
  11. 185
  12. 98
  13. 170
  14. 152
  15. 202
  16. 279
  17. 254
  18. 198
  19. 213
  20. 77
  21. 211
  22. 191
  23. 232
  24. 236
  25. 199
  26. 170
  27. 200
  28. 132
  29. 160
  30. 241
  31. 195
  32. 138
  33. 267
  34. 241
  35. 139
  36. 199
  37. 218
  38. 208
  39. 143
  40. 137

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