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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 894 · 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. 1.79 + 67 + 89 + 76 =
  2. 2.53 + 52 + 49 + 50 =
  3. 3.69 + 55 + 80 + 19 =
  4. 4.26 + 27 + 42 + 36 =
  5. 5.80 + 86 + 54 + 87 =
  6. 6.87 + 27 + 58 + 22 =
  7. 7.69 + 87 + 56 + 54 =
  8. 8.73 + 48 + 61 + 56 =
  9. 9.23 + 36 + 67 + 34 =
  10. 10.85 + 31 + 21 + 25 =
  11. 11.47 + 61 + 16 + 82 =
  12. 12.32 + 24 + 88 + 62 =
  13. 13.30 + 44 + 84 + 30 =
  14. 14.56 + 61 + 59 + 29 =
  15. 15.57 + 44 + 80 + 27 =
  16. 16.85 + 63 + 68 + 85 =
  17. 17.13 + 69 + 51 + 17 =
  18. 18.33 + 12 + 37 + 35 =
  19. 19.14 + 14 + 16 + 89 =
  20. 20.47 + 14 + 42 + 69 =
  21. 21.43 + 70 + 20 + 12 =
  22. 22.15 + 69 + 22 + 75 =
  23. 23.36 + 26 + 63 + 35 =
  24. 24.85 + 57 + 62 + 13 =
  25. 25.29 + 18 + 66 + 51 =
  26. 26.60 + 44 + 54 + 31 =
  27. 27.47 + 44 + 37 + 25 =
  28. 28.43 + 39 + 81 + 60 =
  29. 29.62 + 22 + 60 + 89 =
  30. 30.23 + 86 + 89 + 13 =
  31. 31.67 + 49 + 13 + 13 =
  32. 32.73 + 59 + 60 + 69 =
  33. 33.21 + 21 + 39 + 17 =
  34. 34.31 + 53 + 69 + 85 =
  35. 35.19 + 72 + 71 + 61 =
  36. 36.66 + 19 + 25 + 58 =
  37. 37.58 + 87 + 23 + 58 =
  38. 38.80 + 18 + 47 + 83 =
  39. 39.59 + 20 + 82 + 40 =
  40. 40.49 + 19 + 63 + 44 =

Answer key

  1. 311
  2. 204
  3. 223
  4. 131
  5. 307
  6. 194
  7. 266
  8. 238
  9. 160
  10. 162
  11. 206
  12. 206
  13. 188
  14. 205
  15. 208
  16. 301
  17. 150
  18. 117
  19. 133
  20. 172
  21. 145
  22. 181
  23. 160
  24. 217
  25. 164
  26. 189
  27. 153
  28. 223
  29. 233
  30. 211
  31. 142
  32. 261
  33. 98
  34. 238
  35. 223
  36. 168
  37. 226
  38. 228
  39. 201
  40. 175

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