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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 904 · 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. 1.36 + 53 + 42 + 20 =
  2. 2.88 + 29 + 77 + 53 =
  3. 3.17 + 73 + 51 + 78 =
  4. 4.43 + 17 + 16 + 62 =
  5. 5.39 + 19 + 48 + 20 =
  6. 6.18 + 32 + 11 + 62 =
  7. 7.35 + 39 + 28 + 40 =
  8. 8.39 + 54 + 48 + 44 =
  9. 9.23 + 70 + 12 + 89 =
  10. 10.20 + 77 + 26 + 58 =
  11. 11.15 + 88 + 72 + 82 =
  12. 12.78 + 54 + 48 + 48 =
  13. 13.29 + 73 + 75 + 85 =
  14. 14.37 + 66 + 18 + 23 =
  15. 15.12 + 58 + 46 + 63 =
  16. 16.38 + 79 + 57 + 38 =
  17. 17.82 + 33 + 35 + 86 =
  18. 18.54 + 67 + 71 + 37 =
  19. 19.19 + 60 + 67 + 87 =
  20. 20.25 + 79 + 55 + 73 =
  21. 21.23 + 41 + 70 + 65 =
  22. 22.50 + 54 + 68 + 61 =
  23. 23.88 + 43 + 56 + 14 =
  24. 24.61 + 22 + 48 + 47 =
  25. 25.69 + 21 + 26 + 17 =
  26. 26.59 + 27 + 55 + 26 =
  27. 27.22 + 17 + 86 + 74 =
  28. 28.23 + 84 + 51 + 12 =
  29. 29.32 + 65 + 19 + 54 =
  30. 30.47 + 83 + 83 + 31 =
  31. 31.83 + 18 + 60 + 32 =
  32. 32.88 + 69 + 44 + 37 =
  33. 33.78 + 18 + 32 + 15 =
  34. 34.74 + 17 + 85 + 42 =
  35. 35.37 + 28 + 78 + 39 =
  36. 36.52 + 39 + 21 + 27 =
  37. 37.74 + 64 + 85 + 22 =
  38. 38.40 + 38 + 33 + 38 =
  39. 39.68 + 81 + 22 + 29 =
  40. 40.46 + 78 + 85 + 85 =

Answer key

  1. 151
  2. 247
  3. 219
  4. 138
  5. 126
  6. 123
  7. 142
  8. 185
  9. 194
  10. 181
  11. 257
  12. 228
  13. 262
  14. 144
  15. 179
  16. 212
  17. 236
  18. 229
  19. 233
  20. 232
  21. 199
  22. 233
  23. 201
  24. 178
  25. 133
  26. 167
  27. 199
  28. 170
  29. 170
  30. 244
  31. 193
  32. 238
  33. 143
  34. 218
  35. 182
  36. 139
  37. 245
  38. 149
  39. 200
  40. 294

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