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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 887 · 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. 1.60 + 50 + 78 + 40 =
  2. 2.88 + 49 + 50 + 50 =
  3. 3.73 + 41 + 59 + 20 =
  4. 4.51 + 53 + 47 + 20 =
  5. 5.66 + 51 + 18 + 35 =
  6. 6.18 + 52 + 28 + 19 =
  7. 7.74 + 77 + 22 + 54 =
  8. 8.58 + 54 + 63 + 89 =
  9. 9.63 + 58 + 85 + 40 =
  10. 10.68 + 39 + 26 + 20 =
  11. 11.23 + 33 + 25 + 75 =
  12. 12.56 + 85 + 67 + 31 =
  13. 13.14 + 65 + 48 + 14 =
  14. 14.76 + 52 + 61 + 48 =
  15. 15.72 + 33 + 21 + 30 =
  16. 16.84 + 72 + 13 + 57 =
  17. 17.33 + 70 + 15 + 22 =
  18. 18.59 + 89 + 77 + 50 =
  19. 19.87 + 79 + 29 + 12 =
  20. 20.78 + 21 + 56 + 75 =
  21. 21.76 + 48 + 29 + 16 =
  22. 22.83 + 17 + 27 + 18 =
  23. 23.45 + 52 + 20 + 13 =
  24. 24.46 + 66 + 18 + 87 =
  25. 25.25 + 23 + 22 + 21 =
  26. 26.50 + 69 + 33 + 52 =
  27. 27.68 + 55 + 74 + 42 =
  28. 28.46 + 62 + 40 + 19 =
  29. 29.86 + 18 + 32 + 27 =
  30. 30.40 + 48 + 19 + 60 =
  31. 31.46 + 33 + 23 + 28 =
  32. 32.26 + 20 + 41 + 61 =
  33. 33.38 + 16 + 47 + 34 =
  34. 34.42 + 24 + 79 + 85 =
  35. 35.68 + 41 + 12 + 62 =
  36. 36.72 + 56 + 80 + 85 =
  37. 37.23 + 40 + 85 + 70 =
  38. 38.89 + 83 + 42 + 53 =
  39. 39.54 + 19 + 66 + 20 =
  40. 40.33 + 75 + 11 + 76 =

Answer key

  1. 228
  2. 237
  3. 193
  4. 171
  5. 170
  6. 117
  7. 227
  8. 264
  9. 246
  10. 153
  11. 156
  12. 239
  13. 141
  14. 237
  15. 156
  16. 226
  17. 140
  18. 275
  19. 207
  20. 230
  21. 169
  22. 145
  23. 130
  24. 217
  25. 91
  26. 204
  27. 239
  28. 167
  29. 163
  30. 167
  31. 130
  32. 148
  33. 135
  34. 230
  35. 183
  36. 293
  37. 218
  38. 267
  39. 159
  40. 195

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