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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 860 · 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. 1.27 + 45 + 63 + 21 =
  2. 2.47 + 51 + 13 + 84 =
  3. 3.32 + 15 + 54 + 74 =
  4. 4.68 + 47 + 85 + 73 =
  5. 5.80 + 77 + 20 + 51 =
  6. 6.12 + 25 + 48 + 22 =
  7. 7.16 + 77 + 70 + 80 =
  8. 8.37 + 70 + 53 + 26 =
  9. 9.49 + 83 + 53 + 64 =
  10. 10.70 + 87 + 24 + 47 =
  11. 11.85 + 77 + 69 + 78 =
  12. 12.29 + 50 + 33 + 71 =
  13. 13.30 + 54 + 19 + 23 =
  14. 14.31 + 19 + 47 + 26 =
  15. 15.45 + 38 + 78 + 28 =
  16. 16.82 + 29 + 23 + 27 =
  17. 17.18 + 76 + 26 + 70 =
  18. 18.87 + 58 + 13 + 79 =
  19. 19.74 + 88 + 85 + 47 =
  20. 20.69 + 18 + 79 + 70 =
  21. 21.46 + 85 + 56 + 52 =
  22. 22.88 + 52 + 40 + 73 =
  23. 23.83 + 88 + 69 + 43 =
  24. 24.82 + 23 + 44 + 68 =
  25. 25.72 + 85 + 25 + 79 =
  26. 26.35 + 45 + 33 + 26 =
  27. 27.87 + 50 + 26 + 75 =
  28. 28.82 + 65 + 85 + 45 =
  29. 29.71 + 16 + 25 + 82 =
  30. 30.27 + 83 + 16 + 46 =
  31. 31.81 + 44 + 12 + 11 =
  32. 32.83 + 34 + 55 + 73 =
  33. 33.33 + 77 + 66 + 11 =
  34. 34.88 + 25 + 50 + 79 =
  35. 35.75 + 63 + 13 + 31 =
  36. 36.45 + 74 + 15 + 28 =
  37. 37.38 + 85 + 57 + 65 =
  38. 38.15 + 13 + 12 + 73 =
  39. 39.20 + 71 + 61 + 37 =
  40. 40.80 + 44 + 22 + 22 =

Answer key

  1. 156
  2. 195
  3. 175
  4. 273
  5. 228
  6. 107
  7. 243
  8. 186
  9. 249
  10. 228
  11. 309
  12. 183
  13. 126
  14. 123
  15. 189
  16. 161
  17. 190
  18. 237
  19. 294
  20. 236
  21. 239
  22. 253
  23. 283
  24. 217
  25. 261
  26. 139
  27. 238
  28. 277
  29. 194
  30. 172
  31. 148
  32. 245
  33. 187
  34. 242
  35. 182
  36. 162
  37. 245
  38. 113
  39. 189
  40. 168

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