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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 557 · 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. 1.18 + 67 + 24 + 75 =
  2. 2.26 + 22 + 37 + 61 =
  3. 3.87 + 87 + 47 + 11 =
  4. 4.74 + 53 + 23 + 31 =
  5. 5.89 + 32 + 79 + 63 =
  6. 6.35 + 88 + 61 + 41 =
  7. 7.56 + 58 + 22 + 77 =
  8. 8.72 + 15 + 17 + 83 =
  9. 9.36 + 59 + 17 + 47 =
  10. 10.14 + 21 + 60 + 75 =
  11. 11.75 + 65 + 18 + 75 =
  12. 12.18 + 81 + 32 + 33 =
  13. 13.74 + 29 + 48 + 32 =
  14. 14.70 + 72 + 86 + 55 =
  15. 15.19 + 20 + 39 + 13 =
  16. 16.79 + 50 + 62 + 36 =
  17. 17.67 + 28 + 49 + 24 =
  18. 18.11 + 51 + 52 + 56 =
  19. 19.65 + 15 + 69 + 53 =
  20. 20.68 + 39 + 49 + 85 =
  21. 21.66 + 34 + 79 + 16 =
  22. 22.79 + 50 + 42 + 40 =
  23. 23.59 + 76 + 29 + 69 =
  24. 24.19 + 43 + 12 + 18 =
  25. 25.81 + 19 + 37 + 55 =
  26. 26.71 + 88 + 80 + 89 =
  27. 27.71 + 60 + 27 + 51 =
  28. 28.78 + 36 + 26 + 83 =
  29. 29.76 + 27 + 68 + 13 =
  30. 30.76 + 77 + 64 + 87 =
  31. 31.74 + 45 + 65 + 28 =
  32. 32.26 + 88 + 67 + 24 =
  33. 33.25 + 62 + 46 + 62 =
  34. 34.79 + 32 + 37 + 78 =
  35. 35.39 + 63 + 35 + 82 =
  36. 36.78 + 79 + 55 + 45 =
  37. 37.56 + 20 + 83 + 38 =
  38. 38.77 + 47 + 18 + 29 =
  39. 39.60 + 31 + 28 + 72 =
  40. 40.48 + 30 + 15 + 56 =

Answer key

  1. 184
  2. 146
  3. 232
  4. 181
  5. 263
  6. 225
  7. 213
  8. 187
  9. 159
  10. 170
  11. 233
  12. 164
  13. 183
  14. 283
  15. 91
  16. 227
  17. 168
  18. 170
  19. 202
  20. 241
  21. 195
  22. 211
  23. 233
  24. 92
  25. 192
  26. 328
  27. 209
  28. 223
  29. 184
  30. 304
  31. 212
  32. 205
  33. 195
  34. 226
  35. 219
  36. 257
  37. 197
  38. 171
  39. 191
  40. 149

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