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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 900 · 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. 1.82 + 14 + 87 + 86 =
  2. 2.59 + 12 + 77 + 64 =
  3. 3.86 + 79 + 83 + 69 =
  4. 4.39 + 26 + 29 + 26 =
  5. 5.11 + 71 + 37 + 35 =
  6. 6.46 + 15 + 43 + 72 =
  7. 7.34 + 31 + 67 + 28 =
  8. 8.54 + 36 + 67 + 16 =
  9. 9.13 + 89 + 69 + 62 =
  10. 10.45 + 34 + 32 + 49 =
  11. 11.51 + 23 + 89 + 40 =
  12. 12.21 + 16 + 70 + 32 =
  13. 13.70 + 21 + 12 + 61 =
  14. 14.23 + 81 + 84 + 79 =
  15. 15.74 + 16 + 12 + 63 =
  16. 16.75 + 41 + 87 + 84 =
  17. 17.41 + 48 + 14 + 15 =
  18. 18.51 + 46 + 66 + 77 =
  19. 19.15 + 21 + 70 + 79 =
  20. 20.37 + 70 + 35 + 81 =
  21. 21.61 + 32 + 51 + 28 =
  22. 22.27 + 18 + 36 + 41 =
  23. 23.32 + 41 + 65 + 43 =
  24. 24.35 + 34 + 83 + 71 =
  25. 25.59 + 71 + 34 + 66 =
  26. 26.67 + 73 + 46 + 34 =
  27. 27.33 + 14 + 16 + 63 =
  28. 28.58 + 24 + 70 + 39 =
  29. 29.46 + 89 + 32 + 15 =
  30. 30.25 + 88 + 34 + 73 =
  31. 31.20 + 33 + 68 + 75 =
  32. 32.40 + 24 + 47 + 66 =
  33. 33.69 + 17 + 43 + 84 =
  34. 34.76 + 27 + 42 + 26 =
  35. 35.15 + 75 + 22 + 75 =
  36. 36.16 + 20 + 17 + 28 =
  37. 37.73 + 23 + 34 + 85 =
  38. 38.13 + 77 + 20 + 40 =
  39. 39.16 + 42 + 12 + 89 =
  40. 40.42 + 23 + 63 + 22 =

Answer key

  1. 269
  2. 212
  3. 317
  4. 120
  5. 154
  6. 176
  7. 160
  8. 173
  9. 233
  10. 160
  11. 203
  12. 139
  13. 164
  14. 267
  15. 165
  16. 287
  17. 118
  18. 240
  19. 185
  20. 223
  21. 172
  22. 122
  23. 181
  24. 223
  25. 230
  26. 220
  27. 126
  28. 191
  29. 182
  30. 220
  31. 196
  32. 177
  33. 213
  34. 171
  35. 187
  36. 81
  37. 215
  38. 150
  39. 159
  40. 150

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