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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 242 · 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. 1.43 + 14 + 62 + 80 =
  2. 2.52 + 33 + 88 + 33 =
  3. 3.50 + 11 + 72 + 43 =
  4. 4.66 + 52 + 27 + 21 =
  5. 5.45 + 14 + 34 + 22 =
  6. 6.66 + 35 + 87 + 76 =
  7. 7.73 + 27 + 35 + 32 =
  8. 8.89 + 83 + 64 + 34 =
  9. 9.64 + 83 + 11 + 62 =
  10. 10.43 + 81 + 14 + 30 =
  11. 11.20 + 69 + 22 + 22 =
  12. 12.80 + 68 + 81 + 68 =
  13. 13.64 + 33 + 66 + 54 =
  14. 14.19 + 88 + 76 + 59 =
  15. 15.11 + 66 + 38 + 21 =
  16. 16.62 + 82 + 26 + 67 =
  17. 17.25 + 86 + 89 + 22 =
  18. 18.76 + 14 + 53 + 46 =
  19. 19.34 + 74 + 40 + 76 =
  20. 20.56 + 82 + 66 + 84 =
  21. 21.62 + 58 + 73 + 11 =
  22. 22.72 + 20 + 83 + 66 =
  23. 23.65 + 55 + 17 + 62 =
  24. 24.43 + 70 + 69 + 30 =
  25. 25.70 + 41 + 66 + 19 =
  26. 26.85 + 48 + 20 + 78 =
  27. 27.65 + 67 + 40 + 19 =
  28. 28.60 + 40 + 17 + 89 =
  29. 29.32 + 16 + 11 + 33 =
  30. 30.68 + 12 + 15 + 82 =
  31. 31.59 + 83 + 20 + 88 =
  32. 32.27 + 25 + 43 + 88 =
  33. 33.13 + 57 + 12 + 62 =
  34. 34.33 + 57 + 31 + 13 =
  35. 35.73 + 87 + 48 + 18 =
  36. 36.23 + 17 + 86 + 26 =
  37. 37.37 + 83 + 52 + 13 =
  38. 38.74 + 51 + 63 + 33 =
  39. 39.27 + 15 + 16 + 30 =
  40. 40.53 + 64 + 54 + 83 =

Answer key

  1. 199
  2. 206
  3. 176
  4. 166
  5. 115
  6. 264
  7. 167
  8. 270
  9. 220
  10. 168
  11. 133
  12. 297
  13. 217
  14. 242
  15. 136
  16. 237
  17. 222
  18. 189
  19. 224
  20. 288
  21. 204
  22. 241
  23. 199
  24. 212
  25. 196
  26. 231
  27. 191
  28. 206
  29. 92
  30. 177
  31. 250
  32. 183
  33. 144
  34. 134
  35. 226
  36. 152
  37. 185
  38. 221
  39. 88
  40. 254

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