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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 428 · 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. 1.69 + 38 + 66 + 53 =
  2. 2.56 + 34 + 84 + 57 =
  3. 3.28 + 50 + 72 + 30 =
  4. 4.35 + 84 + 78 + 17 =
  5. 5.52 + 79 + 88 + 68 =
  6. 6.14 + 16 + 37 + 50 =
  7. 7.23 + 39 + 56 + 34 =
  8. 8.34 + 33 + 37 + 11 =
  9. 9.20 + 79 + 78 + 86 =
  10. 10.54 + 38 + 39 + 17 =
  11. 11.38 + 58 + 22 + 57 =
  12. 12.31 + 47 + 15 + 79 =
  13. 13.15 + 11 + 86 + 61 =
  14. 14.53 + 57 + 64 + 49 =
  15. 15.15 + 76 + 40 + 47 =
  16. 16.40 + 66 + 35 + 18 =
  17. 17.45 + 59 + 11 + 17 =
  18. 18.27 + 79 + 20 + 36 =
  19. 19.34 + 18 + 16 + 18 =
  20. 20.14 + 67 + 59 + 85 =
  21. 21.75 + 26 + 30 + 21 =
  22. 22.27 + 41 + 74 + 82 =
  23. 23.85 + 30 + 13 + 89 =
  24. 24.79 + 14 + 15 + 46 =
  25. 25.25 + 12 + 38 + 68 =
  26. 26.21 + 73 + 31 + 76 =
  27. 27.13 + 25 + 59 + 43 =
  28. 28.83 + 74 + 47 + 15 =
  29. 29.52 + 64 + 43 + 34 =
  30. 30.52 + 78 + 57 + 50 =
  31. 31.38 + 79 + 81 + 23 =
  32. 32.85 + 60 + 89 + 77 =
  33. 33.71 + 50 + 14 + 71 =
  34. 34.21 + 31 + 47 + 56 =
  35. 35.17 + 24 + 87 + 89 =
  36. 36.17 + 51 + 30 + 44 =
  37. 37.71 + 46 + 30 + 78 =
  38. 38.17 + 58 + 29 + 30 =
  39. 39.36 + 62 + 28 + 61 =
  40. 40.73 + 46 + 44 + 50 =

Answer key

  1. 226
  2. 231
  3. 180
  4. 214
  5. 287
  6. 117
  7. 152
  8. 115
  9. 263
  10. 148
  11. 175
  12. 172
  13. 173
  14. 223
  15. 178
  16. 159
  17. 132
  18. 162
  19. 86
  20. 225
  21. 152
  22. 224
  23. 217
  24. 154
  25. 143
  26. 201
  27. 140
  28. 219
  29. 193
  30. 237
  31. 221
  32. 311
  33. 206
  34. 155
  35. 217
  36. 142
  37. 225
  38. 134
  39. 187
  40. 213

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