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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 903 · 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. 1.45 + 41 + 89 + 41 =
  2. 2.17 + 81 + 29 + 66 =
  3. 3.29 + 47 + 89 + 12 =
  4. 4.55 + 44 + 18 + 22 =
  5. 5.68 + 87 + 41 + 33 =
  6. 6.40 + 49 + 41 + 66 =
  7. 7.70 + 70 + 62 + 79 =
  8. 8.89 + 28 + 19 + 42 =
  9. 9.28 + 31 + 56 + 49 =
  10. 10.46 + 70 + 45 + 13 =
  11. 11.87 + 24 + 83 + 50 =
  12. 12.68 + 81 + 14 + 78 =
  13. 13.18 + 24 + 24 + 84 =
  14. 14.55 + 48 + 18 + 63 =
  15. 15.26 + 78 + 68 + 76 =
  16. 16.44 + 15 + 24 + 81 =
  17. 17.16 + 61 + 27 + 87 =
  18. 18.15 + 38 + 86 + 84 =
  19. 19.69 + 75 + 25 + 24 =
  20. 20.82 + 69 + 12 + 24 =
  21. 21.62 + 45 + 53 + 32 =
  22. 22.73 + 82 + 19 + 33 =
  23. 23.37 + 58 + 62 + 65 =
  24. 24.62 + 37 + 15 + 47 =
  25. 25.56 + 12 + 54 + 84 =
  26. 26.30 + 77 + 22 + 76 =
  27. 27.86 + 50 + 13 + 84 =
  28. 28.73 + 67 + 14 + 36 =
  29. 29.20 + 65 + 14 + 84 =
  30. 30.71 + 35 + 36 + 63 =
  31. 31.73 + 75 + 19 + 64 =
  32. 32.65 + 77 + 75 + 61 =
  33. 33.11 + 46 + 66 + 57 =
  34. 34.19 + 41 + 45 + 83 =
  35. 35.30 + 28 + 56 + 62 =
  36. 36.57 + 18 + 77 + 13 =
  37. 37.33 + 53 + 21 + 65 =
  38. 38.54 + 74 + 40 + 49 =
  39. 39.80 + 46 + 44 + 47 =
  40. 40.22 + 89 + 87 + 46 =

Answer key

  1. 216
  2. 193
  3. 177
  4. 139
  5. 229
  6. 196
  7. 281
  8. 178
  9. 164
  10. 174
  11. 244
  12. 241
  13. 150
  14. 184
  15. 248
  16. 164
  17. 191
  18. 223
  19. 193
  20. 187
  21. 192
  22. 207
  23. 222
  24. 161
  25. 206
  26. 205
  27. 233
  28. 190
  29. 183
  30. 205
  31. 231
  32. 278
  33. 180
  34. 188
  35. 176
  36. 165
  37. 172
  38. 217
  39. 217
  40. 244

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