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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 998 · 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. 1.17 + 52 + 31 + 53 =
  2. 2.69 + 71 + 25 + 41 =
  3. 3.37 + 26 + 49 + 31 =
  4. 4.14 + 81 + 15 + 87 =
  5. 5.22 + 39 + 85 + 54 =
  6. 6.21 + 49 + 58 + 59 =
  7. 7.82 + 71 + 52 + 31 =
  8. 8.56 + 71 + 85 + 29 =
  9. 9.14 + 83 + 29 + 71 =
  10. 10.76 + 34 + 73 + 50 =
  11. 11.23 + 88 + 29 + 31 =
  12. 12.27 + 26 + 45 + 22 =
  13. 13.63 + 20 + 45 + 23 =
  14. 14.39 + 33 + 81 + 70 =
  15. 15.70 + 81 + 24 + 22 =
  16. 16.45 + 41 + 12 + 26 =
  17. 17.26 + 48 + 66 + 24 =
  18. 18.50 + 68 + 39 + 75 =
  19. 19.84 + 31 + 17 + 58 =
  20. 20.74 + 18 + 15 + 77 =
  21. 21.38 + 42 + 12 + 11 =
  22. 22.57 + 65 + 56 + 45 =
  23. 23.73 + 47 + 52 + 27 =
  24. 24.22 + 37 + 49 + 55 =
  25. 25.12 + 51 + 24 + 62 =
  26. 26.55 + 26 + 67 + 59 =
  27. 27.72 + 60 + 84 + 82 =
  28. 28.11 + 40 + 19 + 72 =
  29. 29.19 + 56 + 80 + 18 =
  30. 30.39 + 40 + 21 + 39 =
  31. 31.50 + 53 + 32 + 34 =
  32. 32.84 + 58 + 24 + 54 =
  33. 33.37 + 15 + 23 + 55 =
  34. 34.52 + 51 + 77 + 26 =
  35. 35.31 + 48 + 48 + 25 =
  36. 36.79 + 85 + 77 + 79 =
  37. 37.47 + 87 + 21 + 40 =
  38. 38.39 + 18 + 37 + 44 =
  39. 39.14 + 71 + 34 + 19 =
  40. 40.74 + 34 + 88 + 23 =

Answer key

  1. 153
  2. 206
  3. 143
  4. 197
  5. 200
  6. 187
  7. 236
  8. 241
  9. 197
  10. 233
  11. 171
  12. 120
  13. 151
  14. 223
  15. 197
  16. 124
  17. 164
  18. 232
  19. 190
  20. 184
  21. 103
  22. 223
  23. 199
  24. 163
  25. 149
  26. 207
  27. 298
  28. 142
  29. 173
  30. 139
  31. 169
  32. 220
  33. 130
  34. 206
  35. 152
  36. 320
  37. 195
  38. 138
  39. 138
  40. 219

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