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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 597 · 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. 1.55 + 75 + 74 + 12 =
  2. 2.48 + 15 + 11 + 29 =
  3. 3.72 + 79 + 31 + 87 =
  4. 4.30 + 86 + 12 + 38 =
  5. 5.61 + 51 + 66 + 60 =
  6. 6.61 + 54 + 42 + 82 =
  7. 7.76 + 11 + 11 + 14 =
  8. 8.15 + 13 + 24 + 30 =
  9. 9.45 + 66 + 84 + 19 =
  10. 10.17 + 36 + 24 + 86 =
  11. 11.13 + 52 + 15 + 29 =
  12. 12.82 + 86 + 23 + 43 =
  13. 13.83 + 28 + 56 + 29 =
  14. 14.31 + 52 + 11 + 84 =
  15. 15.66 + 67 + 19 + 18 =
  16. 16.57 + 61 + 33 + 18 =
  17. 17.15 + 30 + 73 + 22 =
  18. 18.19 + 62 + 67 + 44 =
  19. 19.74 + 63 + 81 + 59 =
  20. 20.84 + 81 + 79 + 40 =
  21. 21.51 + 84 + 69 + 63 =
  22. 22.77 + 74 + 88 + 74 =
  23. 23.27 + 75 + 34 + 82 =
  24. 24.72 + 84 + 42 + 26 =
  25. 25.29 + 23 + 61 + 83 =
  26. 26.55 + 18 + 60 + 32 =
  27. 27.79 + 40 + 19 + 12 =
  28. 28.11 + 75 + 36 + 25 =
  29. 29.74 + 67 + 13 + 52 =
  30. 30.74 + 32 + 23 + 11 =
  31. 31.11 + 35 + 44 + 32 =
  32. 32.86 + 16 + 88 + 16 =
  33. 33.62 + 56 + 23 + 57 =
  34. 34.84 + 34 + 24 + 86 =
  35. 35.86 + 60 + 77 + 30 =
  36. 36.88 + 43 + 64 + 54 =
  37. 37.36 + 20 + 43 + 34 =
  38. 38.59 + 60 + 15 + 48 =
  39. 39.23 + 53 + 30 + 63 =
  40. 40.42 + 12 + 41 + 61 =

Answer key

  1. 216
  2. 103
  3. 269
  4. 166
  5. 238
  6. 239
  7. 112
  8. 82
  9. 214
  10. 163
  11. 109
  12. 234
  13. 196
  14. 178
  15. 170
  16. 169
  17. 140
  18. 192
  19. 277
  20. 284
  21. 267
  22. 313
  23. 218
  24. 224
  25. 196
  26. 165
  27. 150
  28. 147
  29. 206
  30. 140
  31. 122
  32. 206
  33. 198
  34. 228
  35. 253
  36. 249
  37. 133
  38. 182
  39. 169
  40. 156

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