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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 851 · 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. 1.80 + 53 + 89 + 30 =
  2. 2.43 + 22 + 28 + 17 =
  3. 3.23 + 63 + 81 + 13 =
  4. 4.66 + 80 + 27 + 19 =
  5. 5.20 + 54 + 38 + 43 =
  6. 6.25 + 35 + 86 + 49 =
  7. 7.12 + 74 + 15 + 19 =
  8. 8.55 + 14 + 60 + 55 =
  9. 9.40 + 83 + 25 + 41 =
  10. 10.16 + 69 + 80 + 55 =
  11. 11.23 + 75 + 72 + 56 =
  12. 12.26 + 37 + 58 + 20 =
  13. 13.74 + 79 + 87 + 71 =
  14. 14.36 + 80 + 57 + 61 =
  15. 15.68 + 88 + 29 + 47 =
  16. 16.19 + 53 + 39 + 28 =
  17. 17.24 + 52 + 24 + 38 =
  18. 18.47 + 85 + 74 + 29 =
  19. 19.35 + 29 + 64 + 19 =
  20. 20.69 + 21 + 87 + 23 =
  21. 21.46 + 70 + 27 + 15 =
  22. 22.15 + 29 + 11 + 59 =
  23. 23.88 + 73 + 15 + 44 =
  24. 24.11 + 70 + 56 + 85 =
  25. 25.34 + 87 + 54 + 32 =
  26. 26.52 + 16 + 53 + 13 =
  27. 27.68 + 77 + 38 + 16 =
  28. 28.19 + 89 + 49 + 20 =
  29. 29.16 + 45 + 74 + 62 =
  30. 30.30 + 59 + 66 + 31 =
  31. 31.26 + 82 + 35 + 52 =
  32. 32.63 + 53 + 73 + 66 =
  33. 33.34 + 20 + 15 + 89 =
  34. 34.38 + 67 + 70 + 27 =
  35. 35.83 + 34 + 84 + 85 =
  36. 36.89 + 28 + 26 + 40 =
  37. 37.63 + 79 + 47 + 11 =
  38. 38.38 + 44 + 88 + 14 =
  39. 39.14 + 57 + 61 + 28 =
  40. 40.45 + 26 + 43 + 63 =

Answer key

  1. 252
  2. 110
  3. 180
  4. 192
  5. 155
  6. 195
  7. 120
  8. 184
  9. 189
  10. 220
  11. 226
  12. 141
  13. 311
  14. 234
  15. 232
  16. 139
  17. 138
  18. 235
  19. 147
  20. 200
  21. 158
  22. 114
  23. 220
  24. 222
  25. 207
  26. 134
  27. 199
  28. 177
  29. 197
  30. 186
  31. 195
  32. 255
  33. 158
  34. 202
  35. 286
  36. 183
  37. 200
  38. 184
  39. 160
  40. 177

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