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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 896 · 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. 1.37 + 65 + 29 + 24 =
  2. 2.20 + 71 + 67 + 40 =
  3. 3.33 + 47 + 80 + 31 =
  4. 4.30 + 47 + 39 + 36 =
  5. 5.51 + 13 + 43 + 56 =
  6. 6.86 + 55 + 87 + 11 =
  7. 7.48 + 62 + 73 + 13 =
  8. 8.30 + 81 + 29 + 68 =
  9. 9.29 + 64 + 26 + 18 =
  10. 10.14 + 52 + 20 + 49 =
  11. 11.86 + 43 + 39 + 45 =
  12. 12.77 + 38 + 28 + 70 =
  13. 13.65 + 51 + 89 + 41 =
  14. 14.17 + 42 + 43 + 59 =
  15. 15.23 + 41 + 82 + 31 =
  16. 16.73 + 53 + 43 + 18 =
  17. 17.72 + 39 + 71 + 17 =
  18. 18.27 + 67 + 70 + 74 =
  19. 19.81 + 57 + 48 + 82 =
  20. 20.57 + 38 + 27 + 21 =
  21. 21.31 + 69 + 27 + 43 =
  22. 22.61 + 47 + 32 + 20 =
  23. 23.23 + 15 + 74 + 46 =
  24. 24.69 + 38 + 65 + 61 =
  25. 25.85 + 88 + 52 + 71 =
  26. 26.55 + 52 + 79 + 60 =
  27. 27.84 + 42 + 56 + 84 =
  28. 28.84 + 58 + 37 + 43 =
  29. 29.36 + 73 + 66 + 11 =
  30. 30.13 + 79 + 24 + 65 =
  31. 31.70 + 85 + 49 + 36 =
  32. 32.65 + 60 + 22 + 46 =
  33. 33.24 + 83 + 20 + 59 =
  34. 34.63 + 77 + 86 + 26 =
  35. 35.70 + 82 + 44 + 28 =
  36. 36.76 + 80 + 50 + 21 =
  37. 37.74 + 74 + 75 + 66 =
  38. 38.36 + 26 + 21 + 29 =
  39. 39.25 + 71 + 16 + 11 =
  40. 40.40 + 50 + 24 + 30 =

Answer key

  1. 155
  2. 198
  3. 191
  4. 152
  5. 163
  6. 239
  7. 196
  8. 208
  9. 137
  10. 135
  11. 213
  12. 213
  13. 246
  14. 161
  15. 177
  16. 187
  17. 199
  18. 238
  19. 268
  20. 143
  21. 170
  22. 160
  23. 158
  24. 233
  25. 296
  26. 246
  27. 266
  28. 222
  29. 186
  30. 181
  31. 240
  32. 193
  33. 186
  34. 252
  35. 224
  36. 227
  37. 289
  38. 112
  39. 123
  40. 144

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