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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 955 · 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. 1.70 + 71 + 11 + 42 =
  2. 2.84 + 80 + 82 + 70 =
  3. 3.74 + 31 + 15 + 52 =
  4. 4.58 + 73 + 15 + 72 =
  5. 5.20 + 54 + 14 + 46 =
  6. 6.66 + 56 + 88 + 38 =
  7. 7.81 + 25 + 43 + 64 =
  8. 8.72 + 83 + 30 + 27 =
  9. 9.42 + 30 + 16 + 17 =
  10. 10.58 + 74 + 79 + 28 =
  11. 11.68 + 63 + 57 + 14 =
  12. 12.66 + 55 + 46 + 18 =
  13. 13.24 + 71 + 48 + 19 =
  14. 14.23 + 72 + 88 + 21 =
  15. 15.32 + 32 + 39 + 35 =
  16. 16.58 + 13 + 76 + 15 =
  17. 17.72 + 17 + 53 + 87 =
  18. 18.19 + 44 + 28 + 28 =
  19. 19.28 + 36 + 22 + 13 =
  20. 20.23 + 37 + 50 + 76 =
  21. 21.57 + 13 + 54 + 14 =
  22. 22.54 + 15 + 18 + 80 =
  23. 23.39 + 33 + 57 + 25 =
  24. 24.47 + 23 + 80 + 18 =
  25. 25.31 + 76 + 76 + 19 =
  26. 26.47 + 81 + 44 + 21 =
  27. 27.66 + 69 + 16 + 33 =
  28. 28.46 + 72 + 40 + 22 =
  29. 29.59 + 20 + 27 + 77 =
  30. 30.41 + 80 + 78 + 64 =
  31. 31.64 + 12 + 76 + 45 =
  32. 32.36 + 34 + 50 + 55 =
  33. 33.16 + 77 + 15 + 73 =
  34. 34.88 + 42 + 16 + 39 =
  35. 35.24 + 48 + 77 + 22 =
  36. 36.23 + 23 + 84 + 70 =
  37. 37.32 + 18 + 77 + 30 =
  38. 38.15 + 89 + 78 + 42 =
  39. 39.57 + 46 + 68 + 85 =
  40. 40.69 + 86 + 65 + 49 =

Answer key

  1. 194
  2. 316
  3. 172
  4. 218
  5. 134
  6. 248
  7. 213
  8. 212
  9. 105
  10. 239
  11. 202
  12. 185
  13. 162
  14. 204
  15. 138
  16. 162
  17. 229
  18. 119
  19. 99
  20. 186
  21. 138
  22. 167
  23. 154
  24. 168
  25. 202
  26. 193
  27. 184
  28. 180
  29. 183
  30. 263
  31. 197
  32. 175
  33. 181
  34. 185
  35. 171
  36. 200
  37. 157
  38. 224
  39. 256
  40. 269

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