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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 314 · 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. 1.36 + 48 + 20 + 36 =
  2. 2.82 + 22 + 86 + 12 =
  3. 3.29 + 42 + 70 + 56 =
  4. 4.64 + 14 + 50 + 62 =
  5. 5.71 + 30 + 42 + 19 =
  6. 6.50 + 31 + 61 + 38 =
  7. 7.36 + 26 + 50 + 23 =
  8. 8.53 + 73 + 27 + 33 =
  9. 9.14 + 48 + 36 + 75 =
  10. 10.28 + 61 + 80 + 66 =
  11. 11.43 + 14 + 87 + 33 =
  12. 12.33 + 82 + 71 + 33 =
  13. 13.30 + 48 + 54 + 35 =
  14. 14.14 + 59 + 61 + 36 =
  15. 15.50 + 88 + 32 + 19 =
  16. 16.67 + 70 + 24 + 45 =
  17. 17.70 + 75 + 25 + 72 =
  18. 18.76 + 34 + 80 + 23 =
  19. 19.67 + 61 + 16 + 40 =
  20. 20.15 + 59 + 72 + 44 =
  21. 21.20 + 33 + 66 + 59 =
  22. 22.71 + 83 + 78 + 49 =
  23. 23.57 + 89 + 22 + 27 =
  24. 24.41 + 85 + 40 + 30 =
  25. 25.12 + 25 + 67 + 22 =
  26. 26.48 + 17 + 21 + 45 =
  27. 27.29 + 49 + 79 + 67 =
  28. 28.67 + 69 + 88 + 74 =
  29. 29.12 + 81 + 24 + 34 =
  30. 30.24 + 32 + 18 + 35 =
  31. 31.22 + 27 + 74 + 78 =
  32. 32.84 + 65 + 22 + 36 =
  33. 33.36 + 55 + 47 + 30 =
  34. 34.39 + 48 + 84 + 25 =
  35. 35.71 + 59 + 72 + 40 =
  36. 36.68 + 30 + 30 + 39 =
  37. 37.35 + 16 + 19 + 64 =
  38. 38.85 + 63 + 61 + 88 =
  39. 39.11 + 66 + 86 + 83 =
  40. 40.14 + 66 + 28 + 86 =

Answer key

  1. 140
  2. 202
  3. 197
  4. 190
  5. 162
  6. 180
  7. 135
  8. 186
  9. 173
  10. 235
  11. 177
  12. 219
  13. 167
  14. 170
  15. 189
  16. 206
  17. 242
  18. 213
  19. 184
  20. 190
  21. 178
  22. 281
  23. 195
  24. 196
  25. 126
  26. 131
  27. 224
  28. 298
  29. 151
  30. 109
  31. 201
  32. 207
  33. 168
  34. 196
  35. 242
  36. 167
  37. 134
  38. 297
  39. 246
  40. 194

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