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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 416 · 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. 1.15 + 55 + 76 + 19 =
  2. 2.36 + 18 + 15 + 52 =
  3. 3.30 + 22 + 79 + 17 =
  4. 4.82 + 18 + 49 + 61 =
  5. 5.83 + 25 + 43 + 27 =
  6. 6.28 + 87 + 69 + 84 =
  7. 7.80 + 64 + 28 + 29 =
  8. 8.25 + 15 + 89 + 73 =
  9. 9.72 + 72 + 34 + 23 =
  10. 10.36 + 87 + 27 + 55 =
  11. 11.81 + 21 + 88 + 28 =
  12. 12.12 + 79 + 30 + 49 =
  13. 13.12 + 26 + 44 + 31 =
  14. 14.36 + 47 + 33 + 28 =
  15. 15.58 + 60 + 86 + 55 =
  16. 16.12 + 27 + 77 + 25 =
  17. 17.23 + 84 + 14 + 85 =
  18. 18.57 + 21 + 87 + 24 =
  19. 19.74 + 46 + 27 + 29 =
  20. 20.71 + 45 + 29 + 59 =
  21. 21.59 + 62 + 73 + 86 =
  22. 22.43 + 84 + 49 + 22 =
  23. 23.20 + 60 + 40 + 52 =
  24. 24.35 + 42 + 42 + 61 =
  25. 25.20 + 36 + 50 + 20 =
  26. 26.59 + 43 + 40 + 15 =
  27. 27.43 + 63 + 50 + 31 =
  28. 28.14 + 16 + 33 + 84 =
  29. 29.12 + 50 + 63 + 43 =
  30. 30.29 + 30 + 11 + 61 =
  31. 31.15 + 24 + 78 + 14 =
  32. 32.24 + 58 + 13 + 36 =
  33. 33.31 + 47 + 21 + 13 =
  34. 34.53 + 13 + 75 + 43 =
  35. 35.69 + 23 + 68 + 89 =
  36. 36.76 + 75 + 83 + 36 =
  37. 37.30 + 87 + 41 + 59 =
  38. 38.55 + 32 + 73 + 85 =
  39. 39.29 + 29 + 84 + 89 =
  40. 40.70 + 39 + 31 + 82 =

Answer key

  1. 165
  2. 121
  3. 148
  4. 210
  5. 178
  6. 268
  7. 201
  8. 202
  9. 201
  10. 205
  11. 218
  12. 170
  13. 113
  14. 144
  15. 259
  16. 141
  17. 206
  18. 189
  19. 176
  20. 204
  21. 280
  22. 198
  23. 172
  24. 180
  25. 126
  26. 157
  27. 187
  28. 147
  29. 168
  30. 131
  31. 131
  32. 131
  33. 112
  34. 184
  35. 249
  36. 270
  37. 217
  38. 245
  39. 231
  40. 222

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