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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 839 · 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. 1.82 + 36 + 53 + 84 =
  2. 2.52 + 32 + 35 + 19 =
  3. 3.24 + 86 + 77 + 54 =
  4. 4.54 + 64 + 55 + 36 =
  5. 5.44 + 67 + 44 + 71 =
  6. 6.67 + 29 + 67 + 38 =
  7. 7.84 + 11 + 89 + 81 =
  8. 8.29 + 33 + 23 + 33 =
  9. 9.30 + 54 + 39 + 53 =
  10. 10.41 + 21 + 17 + 29 =
  11. 11.85 + 46 + 74 + 75 =
  12. 12.12 + 78 + 45 + 62 =
  13. 13.23 + 43 + 64 + 17 =
  14. 14.42 + 34 + 52 + 25 =
  15. 15.27 + 21 + 35 + 30 =
  16. 16.13 + 79 + 21 + 33 =
  17. 17.43 + 83 + 15 + 67 =
  18. 18.27 + 59 + 63 + 31 =
  19. 19.76 + 20 + 67 + 84 =
  20. 20.27 + 83 + 14 + 32 =
  21. 21.74 + 51 + 70 + 43 =
  22. 22.61 + 14 + 20 + 23 =
  23. 23.11 + 13 + 64 + 44 =
  24. 24.77 + 88 + 70 + 86 =
  25. 25.88 + 72 + 80 + 46 =
  26. 26.28 + 20 + 21 + 77 =
  27. 27.84 + 32 + 44 + 75 =
  28. 28.55 + 38 + 42 + 16 =
  29. 29.72 + 22 + 64 + 61 =
  30. 30.36 + 67 + 56 + 47 =
  31. 31.36 + 33 + 43 + 49 =
  32. 32.18 + 21 + 52 + 19 =
  33. 33.64 + 70 + 28 + 48 =
  34. 34.44 + 71 + 15 + 28 =
  35. 35.34 + 26 + 58 + 89 =
  36. 36.59 + 38 + 43 + 33 =
  37. 37.88 + 16 + 14 + 41 =
  38. 38.68 + 43 + 76 + 30 =
  39. 39.12 + 58 + 46 + 80 =
  40. 40.86 + 71 + 12 + 79 =

Answer key

  1. 255
  2. 138
  3. 241
  4. 209
  5. 226
  6. 201
  7. 265
  8. 118
  9. 176
  10. 108
  11. 280
  12. 197
  13. 147
  14. 153
  15. 113
  16. 146
  17. 208
  18. 180
  19. 247
  20. 156
  21. 238
  22. 118
  23. 132
  24. 321
  25. 286
  26. 146
  27. 235
  28. 151
  29. 219
  30. 206
  31. 161
  32. 110
  33. 210
  34. 158
  35. 207
  36. 173
  37. 159
  38. 217
  39. 196
  40. 248

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