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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 949 · 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. 1.75 + 45 + 76 + 64 =
  2. 2.71 + 32 + 73 + 40 =
  3. 3.16 + 32 + 46 + 12 =
  4. 4.78 + 15 + 14 + 73 =
  5. 5.20 + 88 + 37 + 69 =
  6. 6.17 + 19 + 34 + 13 =
  7. 7.44 + 58 + 38 + 70 =
  8. 8.88 + 37 + 14 + 54 =
  9. 9.28 + 86 + 79 + 12 =
  10. 10.43 + 74 + 33 + 60 =
  11. 11.44 + 41 + 52 + 16 =
  12. 12.82 + 83 + 11 + 50 =
  13. 13.14 + 22 + 21 + 28 =
  14. 14.51 + 43 + 52 + 15 =
  15. 15.38 + 58 + 37 + 76 =
  16. 16.28 + 32 + 58 + 13 =
  17. 17.15 + 66 + 23 + 58 =
  18. 18.63 + 87 + 32 + 58 =
  19. 19.76 + 85 + 42 + 43 =
  20. 20.46 + 77 + 51 + 47 =
  21. 21.87 + 89 + 25 + 65 =
  22. 22.76 + 25 + 28 + 33 =
  23. 23.88 + 15 + 75 + 84 =
  24. 24.39 + 74 + 77 + 80 =
  25. 25.44 + 70 + 70 + 34 =
  26. 26.83 + 38 + 72 + 23 =
  27. 27.24 + 80 + 45 + 89 =
  28. 28.71 + 21 + 65 + 56 =
  29. 29.15 + 40 + 26 + 50 =
  30. 30.46 + 61 + 42 + 64 =
  31. 31.63 + 29 + 52 + 41 =
  32. 32.85 + 38 + 16 + 40 =
  33. 33.48 + 85 + 78 + 40 =
  34. 34.71 + 21 + 11 + 63 =
  35. 35.54 + 34 + 26 + 35 =
  36. 36.56 + 72 + 14 + 74 =
  37. 37.35 + 14 + 29 + 56 =
  38. 38.16 + 21 + 86 + 36 =
  39. 39.81 + 65 + 76 + 31 =
  40. 40.70 + 85 + 14 + 23 =

Answer key

  1. 260
  2. 216
  3. 106
  4. 180
  5. 214
  6. 83
  7. 210
  8. 193
  9. 205
  10. 210
  11. 153
  12. 226
  13. 85
  14. 161
  15. 209
  16. 131
  17. 162
  18. 240
  19. 246
  20. 221
  21. 266
  22. 162
  23. 262
  24. 270
  25. 218
  26. 216
  27. 238
  28. 213
  29. 131
  30. 213
  31. 185
  32. 179
  33. 251
  34. 166
  35. 149
  36. 216
  37. 134
  38. 159
  39. 253
  40. 192

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