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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 540 · 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. 1.18 + 39 + 19 + 73 =
  2. 2.82 + 74 + 49 + 43 =
  3. 3.13 + 13 + 36 + 74 =
  4. 4.89 + 23 + 55 + 20 =
  5. 5.39 + 42 + 31 + 55 =
  6. 6.63 + 34 + 74 + 26 =
  7. 7.72 + 77 + 23 + 89 =
  8. 8.77 + 80 + 32 + 34 =
  9. 9.16 + 36 + 15 + 82 =
  10. 10.24 + 23 + 15 + 31 =
  11. 11.78 + 84 + 81 + 70 =
  12. 12.79 + 76 + 76 + 28 =
  13. 13.29 + 43 + 50 + 26 =
  14. 14.15 + 60 + 88 + 32 =
  15. 15.82 + 26 + 60 + 37 =
  16. 16.16 + 19 + 66 + 86 =
  17. 17.65 + 55 + 64 + 19 =
  18. 18.35 + 35 + 68 + 51 =
  19. 19.85 + 22 + 82 + 80 =
  20. 20.29 + 28 + 38 + 57 =
  21. 21.29 + 65 + 68 + 26 =
  22. 22.27 + 56 + 89 + 37 =
  23. 23.41 + 38 + 86 + 65 =
  24. 24.49 + 78 + 79 + 37 =
  25. 25.81 + 35 + 21 + 58 =
  26. 26.23 + 15 + 64 + 37 =
  27. 27.56 + 26 + 60 + 55 =
  28. 28.89 + 86 + 20 + 61 =
  29. 29.87 + 82 + 40 + 67 =
  30. 30.81 + 13 + 13 + 61 =
  31. 31.45 + 12 + 24 + 48 =
  32. 32.87 + 15 + 62 + 67 =
  33. 33.65 + 74 + 68 + 12 =
  34. 34.78 + 73 + 33 + 50 =
  35. 35.83 + 32 + 88 + 61 =
  36. 36.76 + 11 + 42 + 37 =
  37. 37.48 + 69 + 89 + 18 =
  38. 38.31 + 26 + 22 + 27 =
  39. 39.63 + 13 + 87 + 86 =
  40. 40.72 + 45 + 24 + 25 =

Answer key

  1. 149
  2. 248
  3. 136
  4. 187
  5. 167
  6. 197
  7. 261
  8. 223
  9. 149
  10. 93
  11. 313
  12. 259
  13. 148
  14. 195
  15. 205
  16. 187
  17. 203
  18. 189
  19. 269
  20. 152
  21. 188
  22. 209
  23. 230
  24. 243
  25. 195
  26. 139
  27. 197
  28. 256
  29. 276
  30. 168
  31. 129
  32. 231
  33. 219
  34. 234
  35. 264
  36. 166
  37. 224
  38. 106
  39. 249
  40. 166

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