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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 831 · 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. 1.89 + 60 + 32 + 33 =
  2. 2.49 + 19 + 17 + 27 =
  3. 3.54 + 42 + 76 + 70 =
  4. 4.41 + 21 + 84 + 86 =
  5. 5.72 + 59 + 59 + 17 =
  6. 6.50 + 62 + 31 + 58 =
  7. 7.32 + 51 + 28 + 31 =
  8. 8.83 + 17 + 77 + 83 =
  9. 9.68 + 16 + 68 + 14 =
  10. 10.57 + 63 + 74 + 54 =
  11. 11.51 + 59 + 42 + 11 =
  12. 12.72 + 72 + 53 + 62 =
  13. 13.21 + 68 + 81 + 76 =
  14. 14.76 + 47 + 52 + 64 =
  15. 15.84 + 75 + 81 + 31 =
  16. 16.25 + 35 + 20 + 82 =
  17. 17.69 + 28 + 41 + 64 =
  18. 18.51 + 43 + 47 + 88 =
  19. 19.89 + 81 + 25 + 50 =
  20. 20.19 + 72 + 67 + 22 =
  21. 21.44 + 79 + 53 + 61 =
  22. 22.36 + 13 + 75 + 37 =
  23. 23.46 + 68 + 77 + 47 =
  24. 24.63 + 63 + 24 + 42 =
  25. 25.73 + 44 + 76 + 41 =
  26. 26.16 + 62 + 28 + 20 =
  27. 27.47 + 29 + 32 + 30 =
  28. 28.31 + 82 + 23 + 52 =
  29. 29.86 + 24 + 16 + 54 =
  30. 30.86 + 56 + 85 + 18 =
  31. 31.68 + 23 + 36 + 34 =
  32. 32.77 + 30 + 74 + 72 =
  33. 33.87 + 31 + 74 + 70 =
  34. 34.49 + 31 + 67 + 13 =
  35. 35.53 + 56 + 74 + 34 =
  36. 36.33 + 77 + 23 + 18 =
  37. 37.51 + 61 + 74 + 27 =
  38. 38.69 + 49 + 50 + 16 =
  39. 39.86 + 54 + 80 + 61 =
  40. 40.88 + 18 + 28 + 35 =

Answer key

  1. 214
  2. 112
  3. 242
  4. 232
  5. 207
  6. 201
  7. 142
  8. 260
  9. 166
  10. 248
  11. 163
  12. 259
  13. 246
  14. 239
  15. 271
  16. 162
  17. 202
  18. 229
  19. 245
  20. 180
  21. 237
  22. 161
  23. 238
  24. 192
  25. 234
  26. 126
  27. 138
  28. 188
  29. 180
  30. 245
  31. 161
  32. 253
  33. 262
  34. 160
  35. 217
  36. 151
  37. 213
  38. 184
  39. 281
  40. 169

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