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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 542 · 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. 1.31 + 64 + 86 + 18 =
  2. 2.66 + 64 + 42 + 53 =
  3. 3.49 + 45 + 44 + 19 =
  4. 4.71 + 27 + 51 + 23 =
  5. 5.65 + 28 + 61 + 78 =
  6. 6.50 + 35 + 27 + 18 =
  7. 7.32 + 60 + 57 + 82 =
  8. 8.69 + 79 + 31 + 23 =
  9. 9.80 + 37 + 31 + 23 =
  10. 10.23 + 78 + 83 + 62 =
  11. 11.77 + 30 + 22 + 48 =
  12. 12.17 + 38 + 14 + 60 =
  13. 13.69 + 38 + 89 + 24 =
  14. 14.39 + 88 + 72 + 78 =
  15. 15.59 + 29 + 46 + 20 =
  16. 16.80 + 59 + 21 + 25 =
  17. 17.54 + 28 + 26 + 66 =
  18. 18.49 + 24 + 19 + 71 =
  19. 19.19 + 60 + 17 + 45 =
  20. 20.80 + 56 + 52 + 67 =
  21. 21.46 + 51 + 23 + 79 =
  22. 22.34 + 39 + 15 + 28 =
  23. 23.13 + 81 + 63 + 30 =
  24. 24.28 + 33 + 62 + 61 =
  25. 25.49 + 55 + 77 + 43 =
  26. 26.47 + 31 + 18 + 60 =
  27. 27.45 + 53 + 64 + 87 =
  28. 28.69 + 86 + 28 + 36 =
  29. 29.84 + 56 + 39 + 46 =
  30. 30.83 + 40 + 87 + 49 =
  31. 31.11 + 78 + 64 + 37 =
  32. 32.16 + 49 + 17 + 16 =
  33. 33.52 + 44 + 68 + 73 =
  34. 34.59 + 42 + 42 + 81 =
  35. 35.14 + 28 + 16 + 87 =
  36. 36.21 + 73 + 30 + 82 =
  37. 37.58 + 46 + 23 + 80 =
  38. 38.73 + 87 + 37 + 72 =
  39. 39.17 + 55 + 70 + 77 =
  40. 40.23 + 86 + 66 + 69 =

Answer key

  1. 199
  2. 225
  3. 157
  4. 172
  5. 232
  6. 130
  7. 231
  8. 202
  9. 171
  10. 246
  11. 177
  12. 129
  13. 220
  14. 277
  15. 154
  16. 185
  17. 174
  18. 163
  19. 141
  20. 255
  21. 199
  22. 116
  23. 187
  24. 184
  25. 224
  26. 156
  27. 249
  28. 219
  29. 225
  30. 259
  31. 190
  32. 98
  33. 237
  34. 224
  35. 145
  36. 206
  37. 207
  38. 269
  39. 219
  40. 244

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