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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 567 · 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. 1.30 + 76 + 11 + 16 =
  2. 2.27 + 70 + 50 + 57 =
  3. 3.18 + 28 + 62 + 66 =
  4. 4.23 + 31 + 45 + 52 =
  5. 5.14 + 63 + 52 + 69 =
  6. 6.34 + 89 + 50 + 49 =
  7. 7.19 + 15 + 14 + 43 =
  8. 8.86 + 17 + 49 + 25 =
  9. 9.18 + 35 + 38 + 29 =
  10. 10.37 + 52 + 66 + 41 =
  11. 11.11 + 83 + 60 + 81 =
  12. 12.67 + 18 + 32 + 20 =
  13. 13.16 + 37 + 75 + 83 =
  14. 14.47 + 12 + 26 + 61 =
  15. 15.78 + 16 + 58 + 47 =
  16. 16.30 + 73 + 53 + 42 =
  17. 17.65 + 75 + 40 + 30 =
  18. 18.41 + 37 + 53 + 31 =
  19. 19.18 + 51 + 43 + 87 =
  20. 20.64 + 87 + 39 + 63 =
  21. 21.61 + 16 + 72 + 15 =
  22. 22.57 + 15 + 80 + 72 =
  23. 23.67 + 42 + 79 + 11 =
  24. 24.13 + 45 + 14 + 80 =
  25. 25.79 + 75 + 48 + 58 =
  26. 26.42 + 33 + 68 + 30 =
  27. 27.63 + 29 + 49 + 34 =
  28. 28.85 + 44 + 79 + 79 =
  29. 29.36 + 78 + 80 + 48 =
  30. 30.54 + 64 + 12 + 83 =
  31. 31.87 + 16 + 72 + 73 =
  32. 32.70 + 25 + 65 + 82 =
  33. 33.80 + 79 + 23 + 47 =
  34. 34.74 + 73 + 21 + 34 =
  35. 35.77 + 66 + 28 + 72 =
  36. 36.40 + 37 + 36 + 84 =
  37. 37.88 + 19 + 30 + 51 =
  38. 38.69 + 36 + 25 + 61 =
  39. 39.18 + 38 + 23 + 29 =
  40. 40.29 + 78 + 85 + 88 =

Answer key

  1. 133
  2. 204
  3. 174
  4. 151
  5. 198
  6. 222
  7. 91
  8. 177
  9. 120
  10. 196
  11. 235
  12. 137
  13. 211
  14. 146
  15. 199
  16. 198
  17. 210
  18. 162
  19. 199
  20. 253
  21. 164
  22. 224
  23. 199
  24. 152
  25. 260
  26. 173
  27. 175
  28. 287
  29. 242
  30. 213
  31. 248
  32. 242
  33. 229
  34. 202
  35. 243
  36. 197
  37. 188
  38. 191
  39. 108
  40. 280

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