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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 994 · 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. 1.13 + 69 + 42 + 27 =
  2. 2.68 + 74 + 40 + 78 =
  3. 3.15 + 22 + 21 + 15 =
  4. 4.62 + 18 + 63 + 34 =
  5. 5.19 + 30 + 88 + 71 =
  6. 6.41 + 13 + 51 + 45 =
  7. 7.61 + 21 + 76 + 78 =
  8. 8.48 + 37 + 31 + 41 =
  9. 9.52 + 89 + 67 + 36 =
  10. 10.22 + 51 + 55 + 27 =
  11. 11.16 + 48 + 51 + 75 =
  12. 12.27 + 59 + 87 + 67 =
  13. 13.69 + 76 + 76 + 27 =
  14. 14.20 + 29 + 54 + 28 =
  15. 15.34 + 82 + 33 + 31 =
  16. 16.27 + 16 + 73 + 63 =
  17. 17.27 + 67 + 47 + 13 =
  18. 18.21 + 65 + 84 + 67 =
  19. 19.36 + 32 + 45 + 13 =
  20. 20.39 + 16 + 47 + 18 =
  21. 21.65 + 27 + 45 + 22 =
  22. 22.59 + 21 + 12 + 78 =
  23. 23.72 + 35 + 64 + 50 =
  24. 24.18 + 35 + 54 + 72 =
  25. 25.31 + 26 + 21 + 12 =
  26. 26.15 + 15 + 71 + 48 =
  27. 27.18 + 50 + 77 + 21 =
  28. 28.82 + 44 + 67 + 58 =
  29. 29.37 + 81 + 65 + 83 =
  30. 30.42 + 69 + 40 + 82 =
  31. 31.73 + 54 + 39 + 24 =
  32. 32.81 + 84 + 13 + 56 =
  33. 33.55 + 62 + 45 + 37 =
  34. 34.16 + 73 + 81 + 27 =
  35. 35.22 + 59 + 55 + 67 =
  36. 36.72 + 54 + 33 + 79 =
  37. 37.37 + 45 + 37 + 52 =
  38. 38.61 + 23 + 85 + 48 =
  39. 39.19 + 69 + 34 + 65 =
  40. 40.18 + 14 + 57 + 56 =

Answer key

  1. 151
  2. 260
  3. 73
  4. 177
  5. 208
  6. 150
  7. 236
  8. 157
  9. 244
  10. 155
  11. 190
  12. 240
  13. 248
  14. 131
  15. 180
  16. 179
  17. 154
  18. 237
  19. 126
  20. 120
  21. 159
  22. 170
  23. 221
  24. 179
  25. 90
  26. 149
  27. 166
  28. 251
  29. 266
  30. 233
  31. 190
  32. 234
  33. 199
  34. 197
  35. 203
  36. 238
  37. 171
  38. 217
  39. 187
  40. 145

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