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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 920 · 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 + 47 + 24 + 72 =
  2. 2.83 + 38 + 39 + 65 =
  3. 3.20 + 27 + 48 + 50 =
  4. 4.23 + 85 + 27 + 61 =
  5. 5.35 + 42 + 37 + 44 =
  6. 6.84 + 20 + 33 + 60 =
  7. 7.34 + 11 + 67 + 36 =
  8. 8.21 + 89 + 15 + 28 =
  9. 9.77 + 26 + 61 + 16 =
  10. 10.87 + 39 + 21 + 58 =
  11. 11.11 + 16 + 67 + 71 =
  12. 12.13 + 85 + 87 + 54 =
  13. 13.84 + 69 + 77 + 12 =
  14. 14.38 + 77 + 13 + 83 =
  15. 15.41 + 33 + 82 + 23 =
  16. 16.51 + 49 + 63 + 53 =
  17. 17.26 + 69 + 14 + 57 =
  18. 18.88 + 34 + 53 + 70 =
  19. 19.27 + 37 + 74 + 53 =
  20. 20.50 + 43 + 36 + 44 =
  21. 21.79 + 87 + 23 + 44 =
  22. 22.81 + 11 + 52 + 49 =
  23. 23.19 + 78 + 61 + 38 =
  24. 24.53 + 77 + 80 + 41 =
  25. 25.56 + 53 + 66 + 24 =
  26. 26.14 + 22 + 51 + 23 =
  27. 27.17 + 22 + 65 + 85 =
  28. 28.37 + 15 + 79 + 62 =
  29. 29.87 + 67 + 44 + 76 =
  30. 30.37 + 61 + 48 + 66 =
  31. 31.51 + 24 + 18 + 86 =
  32. 32.19 + 52 + 42 + 47 =
  33. 33.50 + 30 + 43 + 58 =
  34. 34.87 + 53 + 12 + 11 =
  35. 35.80 + 39 + 45 + 63 =
  36. 36.12 + 87 + 46 + 79 =
  37. 37.75 + 80 + 65 + 84 =
  38. 38.88 + 72 + 48 + 36 =
  39. 39.28 + 73 + 86 + 11 =
  40. 40.61 + 36 + 19 + 79 =

Answer key

  1. 180
  2. 225
  3. 145
  4. 196
  5. 158
  6. 197
  7. 148
  8. 153
  9. 180
  10. 205
  11. 165
  12. 239
  13. 242
  14. 211
  15. 179
  16. 216
  17. 166
  18. 245
  19. 191
  20. 173
  21. 233
  22. 193
  23. 196
  24. 251
  25. 199
  26. 110
  27. 189
  28. 193
  29. 274
  30. 212
  31. 179
  32. 160
  33. 181
  34. 163
  35. 227
  36. 224
  37. 304
  38. 244
  39. 198
  40. 195

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