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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 516 · 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. 1.22 + 38 + 85 + 60 =
  2. 2.67 + 63 + 59 + 82 =
  3. 3.21 + 46 + 67 + 62 =
  4. 4.28 + 66 + 70 + 61 =
  5. 5.87 + 74 + 84 + 15 =
  6. 6.69 + 65 + 56 + 84 =
  7. 7.23 + 79 + 68 + 41 =
  8. 8.41 + 19 + 71 + 52 =
  9. 9.62 + 86 + 47 + 77 =
  10. 10.59 + 25 + 28 + 72 =
  11. 11.25 + 56 + 27 + 74 =
  12. 12.64 + 63 + 79 + 31 =
  13. 13.83 + 17 + 35 + 29 =
  14. 14.48 + 45 + 40 + 53 =
  15. 15.56 + 22 + 18 + 47 =
  16. 16.58 + 89 + 37 + 77 =
  17. 17.12 + 83 + 35 + 54 =
  18. 18.23 + 79 + 54 + 42 =
  19. 19.68 + 89 + 77 + 28 =
  20. 20.61 + 75 + 31 + 56 =
  21. 21.34 + 15 + 19 + 87 =
  22. 22.18 + 29 + 75 + 12 =
  23. 23.44 + 88 + 82 + 40 =
  24. 24.15 + 14 + 33 + 28 =
  25. 25.26 + 40 + 57 + 26 =
  26. 26.50 + 47 + 50 + 67 =
  27. 27.56 + 85 + 79 + 63 =
  28. 28.81 + 38 + 82 + 43 =
  29. 29.25 + 77 + 26 + 76 =
  30. 30.74 + 28 + 76 + 32 =
  31. 31.33 + 15 + 46 + 52 =
  32. 32.87 + 64 + 39 + 56 =
  33. 33.59 + 70 + 16 + 65 =
  34. 34.25 + 36 + 64 + 77 =
  35. 35.34 + 33 + 12 + 34 =
  36. 36.85 + 80 + 35 + 22 =
  37. 37.23 + 87 + 49 + 74 =
  38. 38.62 + 26 + 55 + 24 =
  39. 39.39 + 12 + 21 + 84 =
  40. 40.84 + 82 + 68 + 24 =

Answer key

  1. 205
  2. 271
  3. 196
  4. 225
  5. 260
  6. 274
  7. 211
  8. 183
  9. 272
  10. 184
  11. 182
  12. 237
  13. 164
  14. 186
  15. 143
  16. 261
  17. 184
  18. 198
  19. 262
  20. 223
  21. 155
  22. 134
  23. 254
  24. 90
  25. 149
  26. 214
  27. 283
  28. 244
  29. 204
  30. 210
  31. 146
  32. 246
  33. 210
  34. 202
  35. 113
  36. 222
  37. 233
  38. 167
  39. 156
  40. 258

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