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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 789 · 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. 1.56 + 26 + 29 + 29 =
  2. 2.53 + 34 + 84 + 39 =
  3. 3.84 + 56 + 24 + 68 =
  4. 4.36 + 84 + 62 + 88 =
  5. 5.55 + 61 + 82 + 31 =
  6. 6.25 + 30 + 30 + 25 =
  7. 7.24 + 36 + 76 + 28 =
  8. 8.17 + 52 + 13 + 78 =
  9. 9.81 + 89 + 66 + 59 =
  10. 10.74 + 84 + 74 + 45 =
  11. 11.18 + 42 + 77 + 34 =
  12. 12.48 + 26 + 21 + 74 =
  13. 13.82 + 63 + 68 + 68 =
  14. 14.56 + 79 + 44 + 11 =
  15. 15.32 + 56 + 61 + 46 =
  16. 16.63 + 50 + 56 + 89 =
  17. 17.23 + 11 + 80 + 45 =
  18. 18.85 + 33 + 69 + 13 =
  19. 19.28 + 84 + 31 + 79 =
  20. 20.29 + 18 + 31 + 34 =
  21. 21.71 + 34 + 33 + 41 =
  22. 22.76 + 70 + 37 + 53 =
  23. 23.77 + 17 + 64 + 46 =
  24. 24.25 + 22 + 71 + 23 =
  25. 25.64 + 13 + 79 + 85 =
  26. 26.52 + 21 + 11 + 12 =
  27. 27.53 + 82 + 13 + 20 =
  28. 28.23 + 36 + 14 + 22 =
  29. 29.21 + 13 + 42 + 22 =
  30. 30.78 + 15 + 25 + 70 =
  31. 31.19 + 26 + 71 + 49 =
  32. 32.67 + 45 + 78 + 23 =
  33. 33.23 + 69 + 63 + 13 =
  34. 34.72 + 29 + 65 + 62 =
  35. 35.22 + 82 + 80 + 16 =
  36. 36.49 + 76 + 49 + 86 =
  37. 37.16 + 72 + 24 + 16 =
  38. 38.24 + 16 + 31 + 18 =
  39. 39.39 + 18 + 66 + 73 =
  40. 40.47 + 72 + 24 + 73 =

Answer key

  1. 140
  2. 210
  3. 232
  4. 270
  5. 229
  6. 110
  7. 164
  8. 160
  9. 295
  10. 277
  11. 171
  12. 169
  13. 281
  14. 190
  15. 195
  16. 258
  17. 159
  18. 200
  19. 222
  20. 112
  21. 179
  22. 236
  23. 204
  24. 141
  25. 241
  26. 96
  27. 168
  28. 95
  29. 98
  30. 188
  31. 165
  32. 213
  33. 168
  34. 228
  35. 200
  36. 260
  37. 128
  38. 89
  39. 196
  40. 216

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