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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 210 · 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. 1.17 + 64 + 89 + 55 =
  2. 2.24 + 73 + 25 + 46 =
  3. 3.15 + 21 + 13 + 48 =
  4. 4.19 + 84 + 15 + 79 =
  5. 5.85 + 21 + 68 + 51 =
  6. 6.55 + 22 + 50 + 19 =
  7. 7.70 + 71 + 88 + 12 =
  8. 8.47 + 25 + 16 + 57 =
  9. 9.19 + 44 + 36 + 58 =
  10. 10.83 + 26 + 46 + 30 =
  11. 11.71 + 77 + 15 + 62 =
  12. 12.14 + 17 + 57 + 68 =
  13. 13.22 + 74 + 80 + 27 =
  14. 14.32 + 34 + 15 + 73 =
  15. 15.13 + 40 + 74 + 82 =
  16. 16.54 + 34 + 65 + 64 =
  17. 17.25 + 85 + 33 + 62 =
  18. 18.64 + 66 + 77 + 74 =
  19. 19.62 + 46 + 48 + 28 =
  20. 20.17 + 23 + 81 + 24 =
  21. 21.63 + 77 + 55 + 12 =
  22. 22.44 + 21 + 17 + 55 =
  23. 23.56 + 45 + 64 + 71 =
  24. 24.72 + 21 + 28 + 51 =
  25. 25.62 + 78 + 83 + 74 =
  26. 26.57 + 57 + 16 + 27 =
  27. 27.41 + 76 + 28 + 23 =
  28. 28.13 + 84 + 26 + 38 =
  29. 29.62 + 11 + 35 + 60 =
  30. 30.88 + 23 + 85 + 89 =
  31. 31.11 + 33 + 41 + 43 =
  32. 32.60 + 59 + 30 + 72 =
  33. 33.13 + 37 + 59 + 57 =
  34. 34.46 + 14 + 28 + 59 =
  35. 35.35 + 59 + 56 + 88 =
  36. 36.75 + 84 + 50 + 11 =
  37. 37.67 + 18 + 42 + 47 =
  38. 38.13 + 27 + 72 + 57 =
  39. 39.54 + 63 + 50 + 37 =
  40. 40.65 + 57 + 31 + 72 =

Answer key

  1. 225
  2. 168
  3. 97
  4. 197
  5. 225
  6. 146
  7. 241
  8. 145
  9. 157
  10. 185
  11. 225
  12. 156
  13. 203
  14. 154
  15. 209
  16. 217
  17. 205
  18. 281
  19. 184
  20. 145
  21. 207
  22. 137
  23. 236
  24. 172
  25. 297
  26. 157
  27. 168
  28. 161
  29. 168
  30. 285
  31. 128
  32. 221
  33. 166
  34. 147
  35. 238
  36. 220
  37. 174
  38. 169
  39. 204
  40. 225

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