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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 829 · 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. 1.87 + 71 + 72 + 23 =
  2. 2.38 + 19 + 71 + 27 =
  3. 3.11 + 40 + 58 + 41 =
  4. 4.16 + 35 + 33 + 26 =
  5. 5.52 + 37 + 26 + 60 =
  6. 6.36 + 68 + 19 + 14 =
  7. 7.89 + 20 + 32 + 82 =
  8. 8.50 + 87 + 49 + 81 =
  9. 9.63 + 52 + 24 + 58 =
  10. 10.40 + 31 + 79 + 34 =
  11. 11.14 + 42 + 72 + 48 =
  12. 12.52 + 53 + 28 + 49 =
  13. 13.20 + 82 + 35 + 16 =
  14. 14.24 + 75 + 51 + 60 =
  15. 15.67 + 53 + 63 + 21 =
  16. 16.89 + 32 + 22 + 63 =
  17. 17.20 + 30 + 39 + 87 =
  18. 18.24 + 79 + 58 + 52 =
  19. 19.35 + 53 + 12 + 74 =
  20. 20.46 + 81 + 17 + 26 =
  21. 21.80 + 75 + 86 + 34 =
  22. 22.67 + 59 + 20 + 20 =
  23. 23.54 + 37 + 40 + 61 =
  24. 24.29 + 46 + 26 + 67 =
  25. 25.64 + 44 + 22 + 43 =
  26. 26.43 + 56 + 50 + 24 =
  27. 27.82 + 20 + 40 + 29 =
  28. 28.66 + 53 + 18 + 72 =
  29. 29.88 + 32 + 59 + 70 =
  30. 30.73 + 80 + 56 + 14 =
  31. 31.30 + 45 + 25 + 44 =
  32. 32.52 + 58 + 59 + 30 =
  33. 33.85 + 73 + 47 + 70 =
  34. 34.33 + 45 + 41 + 73 =
  35. 35.43 + 19 + 68 + 53 =
  36. 36.63 + 40 + 78 + 33 =
  37. 37.15 + 24 + 16 + 59 =
  38. 38.57 + 60 + 78 + 71 =
  39. 39.59 + 65 + 69 + 40 =
  40. 40.42 + 60 + 49 + 17 =

Answer key

  1. 253
  2. 155
  3. 150
  4. 110
  5. 175
  6. 137
  7. 223
  8. 267
  9. 197
  10. 184
  11. 176
  12. 182
  13. 153
  14. 210
  15. 204
  16. 206
  17. 176
  18. 213
  19. 174
  20. 170
  21. 275
  22. 166
  23. 192
  24. 168
  25. 173
  26. 173
  27. 171
  28. 209
  29. 249
  30. 223
  31. 144
  32. 199
  33. 275
  34. 192
  35. 183
  36. 214
  37. 114
  38. 266
  39. 233
  40. 168

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