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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 918 · 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. 1.32 + 11 + 20 + 57 =
  2. 2.22 + 22 + 41 + 89 =
  3. 3.19 + 27 + 58 + 63 =
  4. 4.55 + 80 + 29 + 43 =
  5. 5.64 + 50 + 37 + 81 =
  6. 6.61 + 42 + 11 + 74 =
  7. 7.60 + 53 + 69 + 31 =
  8. 8.27 + 13 + 26 + 48 =
  9. 9.79 + 18 + 38 + 77 =
  10. 10.30 + 88 + 15 + 75 =
  11. 11.18 + 77 + 22 + 15 =
  12. 12.30 + 29 + 18 + 36 =
  13. 13.49 + 53 + 65 + 79 =
  14. 14.20 + 80 + 60 + 60 =
  15. 15.28 + 71 + 28 + 28 =
  16. 16.20 + 81 + 27 + 30 =
  17. 17.17 + 78 + 82 + 48 =
  18. 18.12 + 37 + 63 + 33 =
  19. 19.14 + 38 + 72 + 11 =
  20. 20.65 + 78 + 74 + 39 =
  21. 21.54 + 42 + 16 + 19 =
  22. 22.81 + 76 + 70 + 51 =
  23. 23.84 + 64 + 24 + 15 =
  24. 24.40 + 18 + 24 + 27 =
  25. 25.39 + 55 + 61 + 33 =
  26. 26.42 + 80 + 40 + 89 =
  27. 27.41 + 29 + 29 + 32 =
  28. 28.76 + 58 + 56 + 53 =
  29. 29.69 + 42 + 87 + 72 =
  30. 30.21 + 88 + 84 + 22 =
  31. 31.47 + 80 + 67 + 83 =
  32. 32.74 + 24 + 17 + 66 =
  33. 33.58 + 56 + 60 + 51 =
  34. 34.65 + 24 + 29 + 74 =
  35. 35.57 + 21 + 24 + 62 =
  36. 36.77 + 13 + 78 + 59 =
  37. 37.24 + 78 + 27 + 83 =
  38. 38.65 + 35 + 45 + 21 =
  39. 39.58 + 14 + 30 + 74 =
  40. 40.48 + 15 + 68 + 84 =

Answer key

  1. 120
  2. 174
  3. 167
  4. 207
  5. 232
  6. 188
  7. 213
  8. 114
  9. 212
  10. 208
  11. 132
  12. 113
  13. 246
  14. 220
  15. 155
  16. 158
  17. 225
  18. 145
  19. 135
  20. 256
  21. 131
  22. 278
  23. 187
  24. 109
  25. 188
  26. 251
  27. 131
  28. 243
  29. 270
  30. 215
  31. 277
  32. 181
  33. 225
  34. 192
  35. 164
  36. 227
  37. 212
  38. 166
  39. 176
  40. 215

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