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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 125 · 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. 1.55 + 47 + 70 + 46 =
  2. 2.51 + 23 + 33 + 31 =
  3. 3.17 + 13 + 59 + 85 =
  4. 4.21 + 30 + 88 + 46 =
  5. 5.59 + 86 + 54 + 66 =
  6. 6.24 + 51 + 24 + 23 =
  7. 7.53 + 49 + 38 + 73 =
  8. 8.28 + 75 + 49 + 18 =
  9. 9.54 + 31 + 43 + 59 =
  10. 10.67 + 62 + 42 + 23 =
  11. 11.22 + 39 + 56 + 82 =
  12. 12.89 + 30 + 58 + 15 =
  13. 13.88 + 20 + 22 + 44 =
  14. 14.40 + 22 + 14 + 46 =
  15. 15.54 + 61 + 65 + 84 =
  16. 16.74 + 52 + 70 + 24 =
  17. 17.42 + 84 + 84 + 54 =
  18. 18.49 + 41 + 73 + 57 =
  19. 19.72 + 24 + 25 + 32 =
  20. 20.67 + 13 + 22 + 44 =
  21. 21.72 + 57 + 18 + 31 =
  22. 22.35 + 41 + 59 + 49 =
  23. 23.40 + 59 + 79 + 12 =
  24. 24.30 + 19 + 64 + 46 =
  25. 25.87 + 23 + 24 + 68 =
  26. 26.67 + 70 + 36 + 20 =
  27. 27.34 + 19 + 16 + 42 =
  28. 28.58 + 48 + 67 + 56 =
  29. 29.38 + 25 + 71 + 32 =
  30. 30.48 + 29 + 61 + 87 =
  31. 31.55 + 86 + 26 + 43 =
  32. 32.30 + 89 + 21 + 57 =
  33. 33.41 + 82 + 11 + 34 =
  34. 34.63 + 58 + 37 + 32 =
  35. 35.81 + 82 + 32 + 65 =
  36. 36.50 + 55 + 65 + 65 =
  37. 37.73 + 60 + 25 + 80 =
  38. 38.63 + 47 + 51 + 45 =
  39. 39.37 + 43 + 57 + 12 =
  40. 40.86 + 40 + 70 + 52 =

Answer key

  1. 218
  2. 138
  3. 174
  4. 185
  5. 265
  6. 122
  7. 213
  8. 170
  9. 187
  10. 194
  11. 199
  12. 192
  13. 174
  14. 122
  15. 264
  16. 220
  17. 264
  18. 220
  19. 153
  20. 146
  21. 178
  22. 184
  23. 190
  24. 159
  25. 202
  26. 193
  27. 111
  28. 229
  29. 166
  30. 225
  31. 210
  32. 197
  33. 168
  34. 190
  35. 260
  36. 235
  37. 238
  38. 206
  39. 149
  40. 248

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