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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 878 · 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. 1.77 + 30 + 47 + 62 =
  2. 2.83 + 63 + 18 + 76 =
  3. 3.48 + 40 + 82 + 14 =
  4. 4.53 + 71 + 41 + 70 =
  5. 5.24 + 15 + 63 + 20 =
  6. 6.41 + 32 + 49 + 36 =
  7. 7.42 + 45 + 20 + 44 =
  8. 8.82 + 16 + 59 + 47 =
  9. 9.36 + 43 + 81 + 33 =
  10. 10.40 + 13 + 34 + 68 =
  11. 11.66 + 57 + 58 + 43 =
  12. 12.30 + 33 + 66 + 58 =
  13. 13.31 + 86 + 22 + 43 =
  14. 14.84 + 25 + 56 + 15 =
  15. 15.80 + 51 + 16 + 85 =
  16. 16.55 + 12 + 52 + 82 =
  17. 17.12 + 52 + 67 + 20 =
  18. 18.55 + 20 + 25 + 42 =
  19. 19.78 + 18 + 14 + 17 =
  20. 20.25 + 32 + 45 + 23 =
  21. 21.88 + 30 + 16 + 55 =
  22. 22.32 + 28 + 55 + 80 =
  23. 23.39 + 63 + 32 + 60 =
  24. 24.29 + 30 + 23 + 76 =
  25. 25.23 + 37 + 22 + 45 =
  26. 26.19 + 13 + 86 + 40 =
  27. 27.37 + 67 + 78 + 18 =
  28. 28.43 + 31 + 29 + 25 =
  29. 29.51 + 60 + 11 + 72 =
  30. 30.71 + 22 + 41 + 88 =
  31. 31.58 + 38 + 15 + 41 =
  32. 32.16 + 65 + 16 + 52 =
  33. 33.18 + 42 + 27 + 48 =
  34. 34.69 + 30 + 88 + 60 =
  35. 35.37 + 75 + 47 + 70 =
  36. 36.74 + 49 + 13 + 35 =
  37. 37.74 + 12 + 64 + 31 =
  38. 38.21 + 53 + 57 + 85 =
  39. 39.23 + 79 + 32 + 19 =
  40. 40.25 + 14 + 23 + 22 =

Answer key

  1. 216
  2. 240
  3. 184
  4. 235
  5. 122
  6. 158
  7. 151
  8. 204
  9. 193
  10. 155
  11. 224
  12. 187
  13. 182
  14. 180
  15. 232
  16. 201
  17. 151
  18. 142
  19. 127
  20. 125
  21. 189
  22. 195
  23. 194
  24. 158
  25. 127
  26. 158
  27. 200
  28. 128
  29. 194
  30. 222
  31. 152
  32. 149
  33. 135
  34. 247
  35. 229
  36. 171
  37. 181
  38. 216
  39. 153
  40. 84

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