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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 315 · 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. 1.35 + 48 + 49 + 72 =
  2. 2.38 + 30 + 79 + 20 =
  3. 3.79 + 13 + 45 + 41 =
  4. 4.74 + 33 + 24 + 68 =
  5. 5.19 + 82 + 12 + 80 =
  6. 6.36 + 59 + 32 + 73 =
  7. 7.43 + 81 + 44 + 17 =
  8. 8.45 + 11 + 67 + 40 =
  9. 9.47 + 46 + 66 + 22 =
  10. 10.36 + 37 + 60 + 78 =
  11. 11.52 + 63 + 28 + 29 =
  12. 12.41 + 82 + 76 + 24 =
  13. 13.74 + 75 + 80 + 46 =
  14. 14.84 + 70 + 24 + 27 =
  15. 15.70 + 87 + 53 + 62 =
  16. 16.48 + 13 + 52 + 48 =
  17. 17.66 + 27 + 14 + 87 =
  18. 18.65 + 81 + 65 + 26 =
  19. 19.84 + 15 + 28 + 79 =
  20. 20.19 + 20 + 79 + 70 =
  21. 21.50 + 50 + 69 + 46 =
  22. 22.11 + 35 + 23 + 48 =
  23. 23.28 + 14 + 57 + 74 =
  24. 24.37 + 63 + 49 + 57 =
  25. 25.12 + 37 + 56 + 61 =
  26. 26.54 + 30 + 60 + 37 =
  27. 27.16 + 68 + 14 + 11 =
  28. 28.80 + 87 + 88 + 20 =
  29. 29.15 + 65 + 29 + 85 =
  30. 30.73 + 44 + 63 + 54 =
  31. 31.48 + 79 + 35 + 83 =
  32. 32.31 + 25 + 71 + 62 =
  33. 33.21 + 46 + 76 + 22 =
  34. 34.55 + 23 + 22 + 86 =
  35. 35.20 + 59 + 29 + 22 =
  36. 36.79 + 54 + 29 + 45 =
  37. 37.55 + 40 + 14 + 76 =
  38. 38.36 + 54 + 18 + 67 =
  39. 39.30 + 53 + 14 + 42 =
  40. 40.61 + 60 + 26 + 43 =

Answer key

  1. 204
  2. 167
  3. 178
  4. 199
  5. 193
  6. 200
  7. 185
  8. 163
  9. 181
  10. 211
  11. 172
  12. 223
  13. 275
  14. 205
  15. 272
  16. 161
  17. 194
  18. 237
  19. 206
  20. 188
  21. 215
  22. 117
  23. 173
  24. 206
  25. 166
  26. 181
  27. 109
  28. 275
  29. 194
  30. 234
  31. 245
  32. 189
  33. 165
  34. 186
  35. 130
  36. 207
  37. 185
  38. 175
  39. 139
  40. 190

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