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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 946 · 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. 1.61 + 61 + 52 + 73 =
  2. 2.46 + 18 + 47 + 68 =
  3. 3.25 + 79 + 71 + 53 =
  4. 4.23 + 32 + 11 + 72 =
  5. 5.25 + 44 + 52 + 62 =
  6. 6.31 + 44 + 16 + 33 =
  7. 7.86 + 47 + 15 + 49 =
  8. 8.35 + 21 + 14 + 64 =
  9. 9.19 + 57 + 57 + 46 =
  10. 10.33 + 54 + 77 + 26 =
  11. 11.77 + 13 + 70 + 14 =
  12. 12.55 + 79 + 76 + 23 =
  13. 13.46 + 54 + 62 + 24 =
  14. 14.56 + 67 + 89 + 71 =
  15. 15.53 + 85 + 45 + 53 =
  16. 16.89 + 13 + 17 + 78 =
  17. 17.60 + 55 + 20 + 76 =
  18. 18.60 + 25 + 12 + 60 =
  19. 19.89 + 34 + 52 + 88 =
  20. 20.28 + 79 + 51 + 75 =
  21. 21.42 + 62 + 31 + 19 =
  22. 22.42 + 22 + 80 + 64 =
  23. 23.67 + 55 + 35 + 26 =
  24. 24.33 + 88 + 31 + 29 =
  25. 25.35 + 46 + 75 + 82 =
  26. 26.75 + 54 + 22 + 29 =
  27. 27.54 + 78 + 88 + 33 =
  28. 28.59 + 76 + 15 + 22 =
  29. 29.23 + 72 + 70 + 12 =
  30. 30.77 + 42 + 55 + 30 =
  31. 31.41 + 28 + 38 + 29 =
  32. 32.68 + 68 + 68 + 63 =
  33. 33.86 + 18 + 22 + 80 =
  34. 34.83 + 47 + 27 + 24 =
  35. 35.53 + 27 + 49 + 71 =
  36. 36.78 + 57 + 36 + 27 =
  37. 37.46 + 89 + 26 + 13 =
  38. 38.19 + 52 + 25 + 31 =
  39. 39.19 + 19 + 40 + 50 =
  40. 40.23 + 23 + 82 + 38 =

Answer key

  1. 247
  2. 179
  3. 228
  4. 138
  5. 183
  6. 124
  7. 197
  8. 134
  9. 179
  10. 190
  11. 174
  12. 233
  13. 186
  14. 283
  15. 236
  16. 197
  17. 211
  18. 157
  19. 263
  20. 233
  21. 154
  22. 208
  23. 183
  24. 181
  25. 238
  26. 180
  27. 253
  28. 172
  29. 177
  30. 204
  31. 136
  32. 267
  33. 206
  34. 181
  35. 200
  36. 198
  37. 174
  38. 127
  39. 128
  40. 166

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