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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 936 · 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. 1.42 + 43 + 61 + 70 =
  2. 2.50 + 40 + 17 + 87 =
  3. 3.64 + 88 + 40 + 11 =
  4. 4.78 + 57 + 78 + 16 =
  5. 5.52 + 14 + 18 + 89 =
  6. 6.46 + 54 + 11 + 44 =
  7. 7.55 + 25 + 49 + 71 =
  8. 8.83 + 84 + 12 + 16 =
  9. 9.27 + 42 + 15 + 87 =
  10. 10.35 + 47 + 45 + 53 =
  11. 11.36 + 53 + 42 + 37 =
  12. 12.28 + 14 + 48 + 15 =
  13. 13.83 + 61 + 28 + 55 =
  14. 14.82 + 85 + 87 + 13 =
  15. 15.58 + 38 + 49 + 65 =
  16. 16.76 + 75 + 26 + 87 =
  17. 17.35 + 53 + 27 + 41 =
  18. 18.89 + 24 + 48 + 25 =
  19. 19.47 + 60 + 75 + 56 =
  20. 20.81 + 50 + 50 + 24 =
  21. 21.30 + 30 + 63 + 50 =
  22. 22.22 + 45 + 11 + 24 =
  23. 23.80 + 36 + 71 + 21 =
  24. 24.78 + 16 + 57 + 68 =
  25. 25.50 + 35 + 69 + 29 =
  26. 26.49 + 74 + 62 + 81 =
  27. 27.50 + 57 + 77 + 56 =
  28. 28.34 + 44 + 25 + 60 =
  29. 29.46 + 53 + 65 + 45 =
  30. 30.82 + 48 + 36 + 16 =
  31. 31.17 + 59 + 83 + 16 =
  32. 32.49 + 64 + 44 + 15 =
  33. 33.49 + 20 + 85 + 12 =
  34. 34.22 + 29 + 65 + 33 =
  35. 35.14 + 68 + 73 + 58 =
  36. 36.86 + 34 + 88 + 47 =
  37. 37.52 + 30 + 84 + 40 =
  38. 38.66 + 73 + 20 + 77 =
  39. 39.26 + 24 + 19 + 72 =
  40. 40.72 + 64 + 89 + 34 =

Answer key

  1. 216
  2. 194
  3. 203
  4. 229
  5. 173
  6. 155
  7. 200
  8. 195
  9. 171
  10. 180
  11. 168
  12. 105
  13. 227
  14. 267
  15. 210
  16. 264
  17. 156
  18. 186
  19. 238
  20. 205
  21. 173
  22. 102
  23. 208
  24. 219
  25. 183
  26. 266
  27. 240
  28. 163
  29. 209
  30. 182
  31. 175
  32. 172
  33. 166
  34. 149
  35. 213
  36. 255
  37. 206
  38. 236
  39. 141
  40. 259

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