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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 411 · 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 + 51 + 44 + 13 =
  2. 2.81 + 16 + 21 + 15 =
  3. 3.77 + 35 + 47 + 77 =
  4. 4.71 + 44 + 86 + 24 =
  5. 5.18 + 69 + 65 + 49 =
  6. 6.55 + 63 + 39 + 52 =
  7. 7.28 + 38 + 48 + 44 =
  8. 8.72 + 39 + 22 + 34 =
  9. 9.20 + 80 + 82 + 44 =
  10. 10.27 + 72 + 11 + 86 =
  11. 11.18 + 78 + 46 + 89 =
  12. 12.80 + 51 + 37 + 31 =
  13. 13.81 + 47 + 56 + 56 =
  14. 14.53 + 55 + 71 + 61 =
  15. 15.20 + 58 + 21 + 45 =
  16. 16.46 + 65 + 42 + 82 =
  17. 17.16 + 49 + 55 + 17 =
  18. 18.31 + 44 + 13 + 80 =
  19. 19.79 + 76 + 86 + 69 =
  20. 20.67 + 23 + 87 + 33 =
  21. 21.50 + 16 + 14 + 84 =
  22. 22.66 + 46 + 31 + 15 =
  23. 23.77 + 35 + 80 + 22 =
  24. 24.58 + 40 + 44 + 15 =
  25. 25.84 + 68 + 52 + 28 =
  26. 26.66 + 15 + 68 + 54 =
  27. 27.57 + 29 + 75 + 35 =
  28. 28.11 + 13 + 55 + 64 =
  29. 29.67 + 83 + 13 + 34 =
  30. 30.33 + 84 + 71 + 39 =
  31. 31.40 + 59 + 87 + 87 =
  32. 32.32 + 46 + 49 + 18 =
  33. 33.20 + 64 + 29 + 65 =
  34. 34.66 + 85 + 50 + 50 =
  35. 35.32 + 34 + 54 + 49 =
  36. 36.37 + 40 + 45 + 17 =
  37. 37.30 + 68 + 42 + 19 =
  38. 38.65 + 89 + 30 + 17 =
  39. 39.28 + 32 + 12 + 77 =
  40. 40.23 + 67 + 58 + 60 =

Answer key

  1. 163
  2. 133
  3. 236
  4. 225
  5. 201
  6. 209
  7. 158
  8. 167
  9. 226
  10. 196
  11. 231
  12. 199
  13. 240
  14. 240
  15. 144
  16. 235
  17. 137
  18. 168
  19. 310
  20. 210
  21. 164
  22. 158
  23. 214
  24. 157
  25. 232
  26. 203
  27. 196
  28. 143
  29. 197
  30. 227
  31. 273
  32. 145
  33. 178
  34. 251
  35. 169
  36. 139
  37. 159
  38. 201
  39. 149
  40. 208

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