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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 612 · 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. 1.40 + 87 + 32 + 87 =
  2. 2.43 + 56 + 27 + 56 =
  3. 3.79 + 42 + 51 + 37 =
  4. 4.74 + 33 + 76 + 37 =
  5. 5.37 + 13 + 27 + 68 =
  6. 6.33 + 12 + 43 + 35 =
  7. 7.54 + 75 + 17 + 16 =
  8. 8.27 + 87 + 84 + 87 =
  9. 9.54 + 23 + 72 + 77 =
  10. 10.32 + 56 + 14 + 46 =
  11. 11.39 + 75 + 30 + 15 =
  12. 12.37 + 26 + 14 + 19 =
  13. 13.71 + 49 + 32 + 14 =
  14. 14.56 + 28 + 84 + 21 =
  15. 15.70 + 68 + 79 + 19 =
  16. 16.79 + 30 + 12 + 64 =
  17. 17.64 + 77 + 40 + 71 =
  18. 18.73 + 28 + 63 + 43 =
  19. 19.74 + 11 + 32 + 18 =
  20. 20.42 + 20 + 60 + 13 =
  21. 21.56 + 50 + 14 + 20 =
  22. 22.19 + 51 + 72 + 60 =
  23. 23.22 + 25 + 69 + 71 =
  24. 24.73 + 17 + 21 + 57 =
  25. 25.41 + 44 + 63 + 28 =
  26. 26.87 + 33 + 46 + 51 =
  27. 27.48 + 35 + 72 + 74 =
  28. 28.65 + 47 + 61 + 46 =
  29. 29.88 + 65 + 47 + 45 =
  30. 30.72 + 73 + 81 + 11 =
  31. 31.32 + 81 + 70 + 41 =
  32. 32.87 + 23 + 81 + 63 =
  33. 33.34 + 65 + 44 + 65 =
  34. 34.12 + 65 + 31 + 43 =
  35. 35.63 + 13 + 59 + 40 =
  36. 36.36 + 53 + 27 + 83 =
  37. 37.72 + 19 + 76 + 58 =
  38. 38.20 + 53 + 52 + 56 =
  39. 39.70 + 32 + 68 + 18 =
  40. 40.51 + 12 + 82 + 89 =

Answer key

  1. 246
  2. 182
  3. 209
  4. 220
  5. 145
  6. 123
  7. 162
  8. 285
  9. 226
  10. 148
  11. 159
  12. 96
  13. 166
  14. 189
  15. 236
  16. 185
  17. 252
  18. 207
  19. 135
  20. 135
  21. 140
  22. 202
  23. 187
  24. 168
  25. 176
  26. 217
  27. 229
  28. 219
  29. 245
  30. 237
  31. 224
  32. 254
  33. 208
  34. 151
  35. 175
  36. 199
  37. 225
  38. 181
  39. 188
  40. 234

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