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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 12 · 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. 1.68 + 67 + 51 + 13 =
  2. 2.23 + 63 + 18 + 43 =
  3. 3.69 + 69 + 12 + 45 =
  4. 4.35 + 12 + 15 + 28 =
  5. 5.39 + 63 + 27 + 55 =
  6. 6.64 + 87 + 74 + 50 =
  7. 7.16 + 82 + 41 + 58 =
  8. 8.57 + 17 + 84 + 88 =
  9. 9.45 + 29 + 46 + 77 =
  10. 10.35 + 77 + 55 + 12 =
  11. 11.40 + 32 + 58 + 22 =
  12. 12.18 + 31 + 61 + 74 =
  13. 13.51 + 50 + 53 + 62 =
  14. 14.65 + 88 + 45 + 34 =
  15. 15.41 + 63 + 54 + 44 =
  16. 16.25 + 60 + 78 + 16 =
  17. 17.75 + 69 + 78 + 34 =
  18. 18.27 + 76 + 69 + 30 =
  19. 19.87 + 71 + 70 + 22 =
  20. 20.23 + 79 + 85 + 20 =
  21. 21.74 + 36 + 79 + 21 =
  22. 22.62 + 31 + 77 + 23 =
  23. 23.29 + 18 + 36 + 40 =
  24. 24.65 + 89 + 82 + 38 =
  25. 25.61 + 39 + 23 + 30 =
  26. 26.18 + 54 + 44 + 12 =
  27. 27.76 + 83 + 37 + 61 =
  28. 28.42 + 38 + 34 + 22 =
  29. 29.80 + 86 + 66 + 16 =
  30. 30.82 + 18 + 39 + 87 =
  31. 31.49 + 51 + 25 + 44 =
  32. 32.11 + 83 + 37 + 77 =
  33. 33.44 + 66 + 41 + 62 =
  34. 34.34 + 19 + 13 + 60 =
  35. 35.24 + 21 + 49 + 58 =
  36. 36.85 + 28 + 57 + 67 =
  37. 37.31 + 50 + 87 + 13 =
  38. 38.79 + 67 + 15 + 62 =
  39. 39.51 + 70 + 65 + 33 =
  40. 40.35 + 60 + 49 + 29 =

Answer key

  1. 199
  2. 147
  3. 195
  4. 90
  5. 184
  6. 275
  7. 197
  8. 246
  9. 197
  10. 179
  11. 152
  12. 184
  13. 216
  14. 232
  15. 202
  16. 179
  17. 256
  18. 202
  19. 250
  20. 207
  21. 210
  22. 193
  23. 123
  24. 274
  25. 153
  26. 128
  27. 257
  28. 136
  29. 248
  30. 226
  31. 169
  32. 208
  33. 213
  34. 126
  35. 152
  36. 237
  37. 181
  38. 223
  39. 219
  40. 173

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