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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 945 · 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. 1.50 + 83 + 25 + 45 =
  2. 2.77 + 63 + 67 + 51 =
  3. 3.31 + 22 + 23 + 19 =
  4. 4.68 + 20 + 81 + 54 =
  5. 5.44 + 77 + 71 + 53 =
  6. 6.81 + 36 + 71 + 54 =
  7. 7.45 + 40 + 16 + 39 =
  8. 8.73 + 12 + 86 + 80 =
  9. 9.47 + 29 + 88 + 79 =
  10. 10.32 + 18 + 78 + 34 =
  11. 11.34 + 51 + 29 + 20 =
  12. 12.84 + 48 + 82 + 34 =
  13. 13.31 + 84 + 36 + 37 =
  14. 14.11 + 83 + 37 + 38 =
  15. 15.86 + 18 + 27 + 47 =
  16. 16.87 + 38 + 67 + 17 =
  17. 17.11 + 38 + 43 + 24 =
  18. 18.35 + 51 + 31 + 22 =
  19. 19.80 + 67 + 66 + 41 =
  20. 20.83 + 28 + 87 + 62 =
  21. 21.64 + 59 + 50 + 25 =
  22. 22.81 + 40 + 83 + 71 =
  23. 23.31 + 79 + 70 + 12 =
  24. 24.13 + 58 + 72 + 27 =
  25. 25.89 + 75 + 29 + 62 =
  26. 26.76 + 41 + 14 + 68 =
  27. 27.40 + 23 + 40 + 35 =
  28. 28.84 + 78 + 88 + 46 =
  29. 29.56 + 59 + 71 + 86 =
  30. 30.49 + 25 + 21 + 78 =
  31. 31.63 + 20 + 56 + 26 =
  32. 32.41 + 56 + 17 + 23 =
  33. 33.25 + 15 + 13 + 84 =
  34. 34.82 + 73 + 37 + 44 =
  35. 35.48 + 18 + 18 + 89 =
  36. 36.84 + 61 + 27 + 63 =
  37. 37.38 + 16 + 40 + 51 =
  38. 38.44 + 61 + 53 + 85 =
  39. 39.61 + 28 + 32 + 62 =
  40. 40.55 + 72 + 56 + 63 =

Answer key

  1. 203
  2. 258
  3. 95
  4. 223
  5. 245
  6. 242
  7. 140
  8. 251
  9. 243
  10. 162
  11. 134
  12. 248
  13. 188
  14. 169
  15. 178
  16. 209
  17. 116
  18. 139
  19. 254
  20. 260
  21. 198
  22. 275
  23. 192
  24. 170
  25. 255
  26. 199
  27. 138
  28. 296
  29. 272
  30. 173
  31. 165
  32. 137
  33. 137
  34. 236
  35. 173
  36. 235
  37. 145
  38. 243
  39. 183
  40. 246

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