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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 432 · 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. 1.29 + 35 + 65 + 22 =
  2. 2.38 + 32 + 73 + 57 =
  3. 3.44 + 70 + 24 + 21 =
  4. 4.76 + 85 + 14 + 42 =
  5. 5.52 + 70 + 16 + 53 =
  6. 6.35 + 22 + 87 + 44 =
  7. 7.23 + 15 + 55 + 32 =
  8. 8.79 + 33 + 88 + 55 =
  9. 9.15 + 19 + 84 + 14 =
  10. 10.21 + 44 + 24 + 69 =
  11. 11.61 + 36 + 67 + 39 =
  12. 12.32 + 20 + 74 + 30 =
  13. 13.22 + 68 + 17 + 40 =
  14. 14.21 + 33 + 72 + 55 =
  15. 15.82 + 63 + 76 + 17 =
  16. 16.38 + 60 + 75 + 11 =
  17. 17.85 + 89 + 27 + 14 =
  18. 18.81 + 53 + 77 + 21 =
  19. 19.50 + 62 + 20 + 87 =
  20. 20.80 + 39 + 38 + 16 =
  21. 21.82 + 17 + 14 + 24 =
  22. 22.52 + 14 + 70 + 28 =
  23. 23.38 + 51 + 35 + 27 =
  24. 24.62 + 27 + 34 + 27 =
  25. 25.53 + 27 + 20 + 72 =
  26. 26.11 + 36 + 29 + 33 =
  27. 27.39 + 48 + 30 + 16 =
  28. 28.35 + 22 + 59 + 53 =
  29. 29.23 + 22 + 64 + 43 =
  30. 30.80 + 80 + 21 + 63 =
  31. 31.35 + 39 + 26 + 52 =
  32. 32.68 + 23 + 71 + 27 =
  33. 33.86 + 15 + 13 + 41 =
  34. 34.52 + 76 + 49 + 42 =
  35. 35.30 + 69 + 32 + 19 =
  36. 36.52 + 42 + 85 + 23 =
  37. 37.81 + 56 + 40 + 64 =
  38. 38.52 + 41 + 13 + 22 =
  39. 39.31 + 71 + 27 + 55 =
  40. 40.38 + 54 + 27 + 52 =

Answer key

  1. 151
  2. 200
  3. 159
  4. 217
  5. 191
  6. 188
  7. 125
  8. 255
  9. 132
  10. 158
  11. 203
  12. 156
  13. 147
  14. 181
  15. 238
  16. 184
  17. 215
  18. 232
  19. 219
  20. 173
  21. 137
  22. 164
  23. 151
  24. 150
  25. 172
  26. 109
  27. 133
  28. 169
  29. 152
  30. 244
  31. 152
  32. 189
  33. 155
  34. 219
  35. 150
  36. 202
  37. 241
  38. 128
  39. 184
  40. 171

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