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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 975 · 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. 1.35 + 27 + 54 + 15 =
  2. 2.80 + 56 + 75 + 48 =
  3. 3.75 + 29 + 40 + 46 =
  4. 4.39 + 49 + 26 + 52 =
  5. 5.55 + 47 + 61 + 52 =
  6. 6.81 + 37 + 71 + 42 =
  7. 7.20 + 37 + 42 + 79 =
  8. 8.15 + 34 + 51 + 21 =
  9. 9.33 + 31 + 89 + 56 =
  10. 10.43 + 21 + 59 + 85 =
  11. 11.46 + 48 + 71 + 69 =
  12. 12.64 + 41 + 63 + 73 =
  13. 13.46 + 74 + 31 + 31 =
  14. 14.17 + 12 + 14 + 74 =
  15. 15.28 + 41 + 54 + 20 =
  16. 16.20 + 21 + 26 + 89 =
  17. 17.34 + 53 + 58 + 54 =
  18. 18.30 + 50 + 40 + 85 =
  19. 19.19 + 29 + 38 + 27 =
  20. 20.44 + 46 + 76 + 31 =
  21. 21.45 + 86 + 35 + 73 =
  22. 22.60 + 40 + 80 + 48 =
  23. 23.18 + 31 + 21 + 28 =
  24. 24.11 + 67 + 79 + 13 =
  25. 25.11 + 60 + 49 + 65 =
  26. 26.15 + 60 + 84 + 70 =
  27. 27.76 + 82 + 33 + 61 =
  28. 28.37 + 53 + 39 + 19 =
  29. 29.36 + 45 + 62 + 44 =
  30. 30.48 + 17 + 45 + 31 =
  31. 31.53 + 87 + 68 + 70 =
  32. 32.36 + 19 + 18 + 79 =
  33. 33.48 + 55 + 79 + 79 =
  34. 34.73 + 30 + 49 + 27 =
  35. 35.32 + 24 + 48 + 13 =
  36. 36.47 + 30 + 79 + 29 =
  37. 37.20 + 54 + 18 + 42 =
  38. 38.22 + 18 + 75 + 64 =
  39. 39.80 + 31 + 63 + 64 =
  40. 40.85 + 41 + 42 + 18 =

Answer key

  1. 131
  2. 259
  3. 190
  4. 166
  5. 215
  6. 231
  7. 178
  8. 121
  9. 209
  10. 208
  11. 234
  12. 241
  13. 182
  14. 117
  15. 143
  16. 156
  17. 199
  18. 205
  19. 113
  20. 197
  21. 239
  22. 228
  23. 98
  24. 170
  25. 185
  26. 229
  27. 252
  28. 148
  29. 187
  30. 141
  31. 278
  32. 152
  33. 261
  34. 179
  35. 117
  36. 185
  37. 134
  38. 179
  39. 238
  40. 186

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