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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 61 · 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. 1.81 + 46 + 54 + 31 =
  2. 2.77 + 28 + 49 + 21 =
  3. 3.18 + 17 + 23 + 50 =
  4. 4.34 + 74 + 65 + 36 =
  5. 5.61 + 34 + 45 + 52 =
  6. 6.79 + 60 + 17 + 50 =
  7. 7.27 + 66 + 30 + 42 =
  8. 8.27 + 51 + 45 + 79 =
  9. 9.35 + 82 + 33 + 23 =
  10. 10.38 + 13 + 83 + 22 =
  11. 11.61 + 19 + 71 + 30 =
  12. 12.71 + 73 + 85 + 49 =
  13. 13.79 + 56 + 59 + 15 =
  14. 14.81 + 73 + 27 + 30 =
  15. 15.74 + 66 + 66 + 87 =
  16. 16.13 + 35 + 89 + 53 =
  17. 17.86 + 81 + 86 + 35 =
  18. 18.21 + 60 + 27 + 19 =
  19. 19.35 + 63 + 62 + 38 =
  20. 20.52 + 34 + 84 + 56 =
  21. 21.63 + 76 + 39 + 40 =
  22. 22.41 + 22 + 88 + 13 =
  23. 23.32 + 13 + 82 + 51 =
  24. 24.71 + 39 + 75 + 13 =
  25. 25.68 + 71 + 11 + 18 =
  26. 26.84 + 21 + 36 + 14 =
  27. 27.70 + 46 + 75 + 45 =
  28. 28.16 + 16 + 84 + 66 =
  29. 29.50 + 37 + 21 + 17 =
  30. 30.63 + 21 + 58 + 60 =
  31. 31.35 + 67 + 71 + 32 =
  32. 32.50 + 44 + 78 + 62 =
  33. 33.69 + 16 + 27 + 33 =
  34. 34.25 + 61 + 29 + 23 =
  35. 35.13 + 16 + 86 + 78 =
  36. 36.27 + 60 + 46 + 26 =
  37. 37.14 + 73 + 51 + 89 =
  38. 38.81 + 80 + 80 + 42 =
  39. 39.78 + 74 + 12 + 51 =
  40. 40.29 + 53 + 68 + 22 =

Answer key

  1. 212
  2. 175
  3. 108
  4. 209
  5. 192
  6. 206
  7. 165
  8. 202
  9. 173
  10. 156
  11. 181
  12. 278
  13. 209
  14. 211
  15. 293
  16. 190
  17. 288
  18. 127
  19. 198
  20. 226
  21. 218
  22. 164
  23. 178
  24. 198
  25. 168
  26. 155
  27. 236
  28. 182
  29. 125
  30. 202
  31. 205
  32. 234
  33. 145
  34. 138
  35. 193
  36. 159
  37. 227
  38. 283
  39. 215
  40. 172

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