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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 435 · 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. 1.48 + 11 + 23 + 63 =
  2. 2.54 + 20 + 74 + 67 =
  3. 3.12 + 67 + 54 + 47 =
  4. 4.89 + 42 + 68 + 46 =
  5. 5.48 + 51 + 13 + 55 =
  6. 6.59 + 33 + 21 + 67 =
  7. 7.82 + 33 + 13 + 66 =
  8. 8.71 + 75 + 72 + 72 =
  9. 9.23 + 64 + 56 + 71 =
  10. 10.14 + 17 + 89 + 49 =
  11. 11.29 + 81 + 78 + 72 =
  12. 12.15 + 27 + 38 + 63 =
  13. 13.28 + 67 + 32 + 27 =
  14. 14.40 + 77 + 34 + 32 =
  15. 15.39 + 37 + 48 + 47 =
  16. 16.21 + 41 + 25 + 25 =
  17. 17.52 + 31 + 82 + 12 =
  18. 18.70 + 63 + 57 + 67 =
  19. 19.89 + 34 + 30 + 82 =
  20. 20.50 + 33 + 30 + 42 =
  21. 21.81 + 39 + 28 + 76 =
  22. 22.85 + 34 + 12 + 57 =
  23. 23.26 + 13 + 34 + 19 =
  24. 24.33 + 65 + 47 + 78 =
  25. 25.22 + 60 + 79 + 46 =
  26. 26.30 + 17 + 84 + 29 =
  27. 27.88 + 61 + 76 + 70 =
  28. 28.44 + 63 + 87 + 12 =
  29. 29.62 + 66 + 15 + 66 =
  30. 30.63 + 30 + 42 + 30 =
  31. 31.36 + 18 + 38 + 87 =
  32. 32.67 + 86 + 48 + 48 =
  33. 33.55 + 77 + 14 + 14 =
  34. 34.49 + 35 + 55 + 38 =
  35. 35.23 + 66 + 61 + 62 =
  36. 36.83 + 40 + 58 + 89 =
  37. 37.71 + 35 + 70 + 63 =
  38. 38.55 + 17 + 70 + 25 =
  39. 39.29 + 56 + 87 + 43 =
  40. 40.12 + 72 + 40 + 66 =

Answer key

  1. 145
  2. 215
  3. 180
  4. 245
  5. 167
  6. 180
  7. 194
  8. 290
  9. 214
  10. 169
  11. 260
  12. 143
  13. 154
  14. 183
  15. 171
  16. 112
  17. 177
  18. 257
  19. 235
  20. 155
  21. 224
  22. 188
  23. 92
  24. 223
  25. 207
  26. 160
  27. 295
  28. 206
  29. 209
  30. 165
  31. 179
  32. 249
  33. 160
  34. 177
  35. 212
  36. 270
  37. 239
  38. 167
  39. 215
  40. 190

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