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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 508 · 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. 1.20 + 60 + 82 + 19 =
  2. 2.52 + 61 + 18 + 51 =
  3. 3.55 + 59 + 37 + 48 =
  4. 4.43 + 27 + 62 + 45 =
  5. 5.45 + 80 + 86 + 85 =
  6. 6.24 + 21 + 47 + 12 =
  7. 7.29 + 22 + 48 + 55 =
  8. 8.87 + 28 + 18 + 21 =
  9. 9.32 + 19 + 40 + 77 =
  10. 10.19 + 12 + 55 + 31 =
  11. 11.63 + 54 + 43 + 64 =
  12. 12.23 + 37 + 64 + 79 =
  13. 13.17 + 50 + 28 + 78 =
  14. 14.55 + 33 + 85 + 21 =
  15. 15.52 + 89 + 84 + 30 =
  16. 16.33 + 57 + 64 + 82 =
  17. 17.38 + 26 + 11 + 63 =
  18. 18.78 + 21 + 87 + 23 =
  19. 19.60 + 35 + 86 + 86 =
  20. 20.50 + 66 + 17 + 21 =
  21. 21.79 + 55 + 52 + 57 =
  22. 22.73 + 60 + 86 + 63 =
  23. 23.60 + 25 + 53 + 62 =
  24. 24.17 + 85 + 84 + 34 =
  25. 25.30 + 71 + 17 + 15 =
  26. 26.86 + 29 + 75 + 32 =
  27. 27.40 + 67 + 12 + 17 =
  28. 28.17 + 77 + 29 + 49 =
  29. 29.71 + 24 + 80 + 66 =
  30. 30.70 + 63 + 58 + 81 =
  31. 31.13 + 57 + 29 + 26 =
  32. 32.58 + 36 + 20 + 49 =
  33. 33.49 + 13 + 36 + 70 =
  34. 34.32 + 12 + 55 + 33 =
  35. 35.76 + 51 + 33 + 30 =
  36. 36.43 + 46 + 77 + 79 =
  37. 37.32 + 56 + 14 + 79 =
  38. 38.82 + 31 + 12 + 81 =
  39. 39.16 + 29 + 43 + 87 =
  40. 40.74 + 27 + 34 + 40 =

Answer key

  1. 181
  2. 182
  3. 199
  4. 177
  5. 296
  6. 104
  7. 154
  8. 154
  9. 168
  10. 117
  11. 224
  12. 203
  13. 173
  14. 194
  15. 255
  16. 236
  17. 138
  18. 209
  19. 267
  20. 154
  21. 243
  22. 282
  23. 200
  24. 220
  25. 133
  26. 222
  27. 136
  28. 172
  29. 241
  30. 272
  31. 125
  32. 163
  33. 168
  34. 132
  35. 190
  36. 245
  37. 181
  38. 206
  39. 175
  40. 175

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