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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 871 · 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. 1.19 + 80 + 17 + 36 =
  2. 2.16 + 47 + 37 + 23 =
  3. 3.72 + 11 + 18 + 35 =
  4. 4.59 + 26 + 63 + 85 =
  5. 5.53 + 66 + 81 + 88 =
  6. 6.32 + 39 + 49 + 37 =
  7. 7.60 + 54 + 65 + 14 =
  8. 8.78 + 30 + 15 + 40 =
  9. 9.65 + 20 + 64 + 39 =
  10. 10.13 + 40 + 76 + 72 =
  11. 11.78 + 85 + 58 + 18 =
  12. 12.58 + 39 + 25 + 50 =
  13. 13.35 + 66 + 78 + 34 =
  14. 14.84 + 58 + 56 + 26 =
  15. 15.73 + 22 + 88 + 67 =
  16. 16.21 + 21 + 83 + 25 =
  17. 17.39 + 63 + 26 + 65 =
  18. 18.81 + 39 + 71 + 48 =
  19. 19.24 + 73 + 51 + 36 =
  20. 20.74 + 19 + 39 + 50 =
  21. 21.31 + 31 + 56 + 40 =
  22. 22.69 + 87 + 22 + 85 =
  23. 23.42 + 40 + 57 + 68 =
  24. 24.38 + 25 + 32 + 56 =
  25. 25.70 + 29 + 66 + 29 =
  26. 26.80 + 68 + 19 + 42 =
  27. 27.39 + 11 + 69 + 55 =
  28. 28.24 + 65 + 13 + 49 =
  29. 29.59 + 12 + 43 + 74 =
  30. 30.89 + 60 + 71 + 34 =
  31. 31.12 + 20 + 72 + 88 =
  32. 32.69 + 53 + 25 + 63 =
  33. 33.89 + 82 + 16 + 13 =
  34. 34.15 + 48 + 42 + 26 =
  35. 35.46 + 24 + 59 + 16 =
  36. 36.44 + 19 + 13 + 67 =
  37. 37.54 + 49 + 34 + 54 =
  38. 38.29 + 23 + 17 + 24 =
  39. 39.73 + 20 + 38 + 59 =
  40. 40.66 + 75 + 87 + 75 =

Answer key

  1. 152
  2. 123
  3. 136
  4. 233
  5. 288
  6. 157
  7. 193
  8. 163
  9. 188
  10. 201
  11. 239
  12. 172
  13. 213
  14. 224
  15. 250
  16. 150
  17. 193
  18. 239
  19. 184
  20. 182
  21. 158
  22. 263
  23. 207
  24. 151
  25. 194
  26. 209
  27. 174
  28. 151
  29. 188
  30. 254
  31. 192
  32. 210
  33. 200
  34. 131
  35. 145
  36. 143
  37. 191
  38. 93
  39. 190
  40. 303

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