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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 60 · 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. 1.13 + 57 + 81 + 54 =
  2. 2.41 + 79 + 45 + 28 =
  3. 3.17 + 87 + 87 + 16 =
  4. 4.36 + 52 + 28 + 35 =
  5. 5.23 + 53 + 11 + 80 =
  6. 6.70 + 21 + 26 + 19 =
  7. 7.46 + 86 + 61 + 42 =
  8. 8.64 + 21 + 74 + 61 =
  9. 9.13 + 37 + 65 + 12 =
  10. 10.75 + 46 + 88 + 49 =
  11. 11.12 + 33 + 15 + 19 =
  12. 12.69 + 88 + 57 + 50 =
  13. 13.83 + 55 + 66 + 32 =
  14. 14.58 + 16 + 25 + 22 =
  15. 15.53 + 63 + 58 + 32 =
  16. 16.21 + 35 + 86 + 25 =
  17. 17.67 + 54 + 85 + 17 =
  18. 18.30 + 25 + 12 + 48 =
  19. 19.73 + 74 + 15 + 30 =
  20. 20.78 + 66 + 57 + 37 =
  21. 21.13 + 18 + 42 + 57 =
  22. 22.19 + 68 + 78 + 20 =
  23. 23.56 + 80 + 36 + 16 =
  24. 24.54 + 77 + 36 + 15 =
  25. 25.59 + 38 + 72 + 44 =
  26. 26.78 + 88 + 77 + 22 =
  27. 27.20 + 65 + 82 + 78 =
  28. 28.19 + 78 + 26 + 55 =
  29. 29.89 + 60 + 61 + 15 =
  30. 30.69 + 17 + 62 + 73 =
  31. 31.45 + 11 + 29 + 15 =
  32. 32.30 + 21 + 13 + 81 =
  33. 33.65 + 36 + 18 + 44 =
  34. 34.79 + 46 + 79 + 82 =
  35. 35.59 + 77 + 46 + 41 =
  36. 36.35 + 85 + 41 + 23 =
  37. 37.30 + 79 + 76 + 30 =
  38. 38.62 + 70 + 25 + 41 =
  39. 39.77 + 25 + 48 + 54 =
  40. 40.66 + 23 + 30 + 27 =

Answer key

  1. 205
  2. 193
  3. 207
  4. 151
  5. 167
  6. 136
  7. 235
  8. 220
  9. 127
  10. 258
  11. 79
  12. 264
  13. 236
  14. 121
  15. 206
  16. 167
  17. 223
  18. 115
  19. 192
  20. 238
  21. 130
  22. 185
  23. 188
  24. 182
  25. 213
  26. 265
  27. 245
  28. 178
  29. 225
  30. 221
  31. 100
  32. 145
  33. 163
  34. 286
  35. 223
  36. 184
  37. 215
  38. 198
  39. 204
  40. 146

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