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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 990 · 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. 1.85 + 14 + 73 + 76 =
  2. 2.12 + 75 + 88 + 43 =
  3. 3.77 + 69 + 32 + 78 =
  4. 4.88 + 24 + 43 + 84 =
  5. 5.88 + 30 + 47 + 50 =
  6. 6.81 + 19 + 87 + 44 =
  7. 7.48 + 62 + 72 + 28 =
  8. 8.75 + 44 + 34 + 84 =
  9. 9.12 + 34 + 40 + 67 =
  10. 10.45 + 66 + 63 + 40 =
  11. 11.83 + 55 + 55 + 56 =
  12. 12.72 + 22 + 26 + 14 =
  13. 13.84 + 85 + 27 + 68 =
  14. 14.45 + 53 + 50 + 77 =
  15. 15.46 + 49 + 33 + 17 =
  16. 16.36 + 45 + 81 + 70 =
  17. 17.47 + 67 + 16 + 18 =
  18. 18.26 + 20 + 79 + 88 =
  19. 19.38 + 48 + 20 + 85 =
  20. 20.14 + 83 + 43 + 64 =
  21. 21.31 + 32 + 42 + 12 =
  22. 22.31 + 60 + 53 + 79 =
  23. 23.35 + 86 + 36 + 73 =
  24. 24.47 + 53 + 74 + 85 =
  25. 25.70 + 73 + 72 + 64 =
  26. 26.68 + 79 + 70 + 11 =
  27. 27.63 + 44 + 86 + 71 =
  28. 28.86 + 16 + 28 + 68 =
  29. 29.74 + 41 + 38 + 54 =
  30. 30.84 + 18 + 13 + 81 =
  31. 31.51 + 37 + 29 + 18 =
  32. 32.21 + 29 + 73 + 78 =
  33. 33.12 + 45 + 71 + 42 =
  34. 34.33 + 83 + 51 + 38 =
  35. 35.78 + 42 + 18 + 17 =
  36. 36.72 + 87 + 48 + 73 =
  37. 37.23 + 78 + 56 + 34 =
  38. 38.28 + 26 + 68 + 18 =
  39. 39.33 + 56 + 79 + 68 =
  40. 40.89 + 25 + 88 + 84 =

Answer key

  1. 248
  2. 218
  3. 256
  4. 239
  5. 215
  6. 231
  7. 210
  8. 237
  9. 153
  10. 214
  11. 249
  12. 134
  13. 264
  14. 225
  15. 145
  16. 232
  17. 148
  18. 213
  19. 191
  20. 204
  21. 117
  22. 223
  23. 230
  24. 259
  25. 279
  26. 228
  27. 264
  28. 198
  29. 207
  30. 196
  31. 135
  32. 201
  33. 170
  34. 205
  35. 155
  36. 280
  37. 191
  38. 140
  39. 236
  40. 286

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