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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 698 · 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. 1.89 + 57 + 63 + 15 =
  2. 2.61 + 44 + 40 + 79 =
  3. 3.12 + 50 + 72 + 47 =
  4. 4.15 + 71 + 30 + 21 =
  5. 5.27 + 35 + 52 + 72 =
  6. 6.12 + 71 + 72 + 13 =
  7. 7.16 + 54 + 46 + 79 =
  8. 8.53 + 82 + 15 + 46 =
  9. 9.56 + 65 + 83 + 80 =
  10. 10.80 + 20 + 17 + 17 =
  11. 11.47 + 31 + 62 + 24 =
  12. 12.26 + 26 + 15 + 57 =
  13. 13.75 + 86 + 59 + 43 =
  14. 14.16 + 64 + 74 + 34 =
  15. 15.14 + 81 + 69 + 62 =
  16. 16.61 + 31 + 81 + 25 =
  17. 17.22 + 47 + 27 + 61 =
  18. 18.58 + 70 + 86 + 40 =
  19. 19.28 + 12 + 11 + 75 =
  20. 20.68 + 68 + 17 + 72 =
  21. 21.16 + 81 + 59 + 78 =
  22. 22.44 + 89 + 27 + 36 =
  23. 23.45 + 31 + 40 + 70 =
  24. 24.61 + 66 + 85 + 80 =
  25. 25.47 + 76 + 64 + 11 =
  26. 26.70 + 19 + 51 + 38 =
  27. 27.53 + 34 + 22 + 88 =
  28. 28.70 + 49 + 61 + 64 =
  29. 29.53 + 12 + 82 + 41 =
  30. 30.75 + 73 + 36 + 52 =
  31. 31.55 + 83 + 85 + 44 =
  32. 32.24 + 34 + 46 + 42 =
  33. 33.11 + 32 + 60 + 53 =
  34. 34.60 + 64 + 38 + 69 =
  35. 35.24 + 62 + 87 + 89 =
  36. 36.11 + 75 + 71 + 79 =
  37. 37.53 + 36 + 73 + 64 =
  38. 38.22 + 31 + 51 + 38 =
  39. 39.23 + 85 + 13 + 59 =
  40. 40.89 + 24 + 32 + 32 =

Answer key

  1. 224
  2. 224
  3. 181
  4. 137
  5. 186
  6. 168
  7. 195
  8. 196
  9. 284
  10. 134
  11. 164
  12. 124
  13. 263
  14. 188
  15. 226
  16. 198
  17. 157
  18. 254
  19. 126
  20. 225
  21. 234
  22. 196
  23. 186
  24. 292
  25. 198
  26. 178
  27. 197
  28. 244
  29. 188
  30. 236
  31. 267
  32. 146
  33. 156
  34. 231
  35. 262
  36. 236
  37. 226
  38. 142
  39. 180
  40. 177

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