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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 937 · 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. 1.40 + 70 + 22 + 81 =
  2. 2.82 + 53 + 75 + 17 =
  3. 3.46 + 11 + 17 + 54 =
  4. 4.86 + 56 + 33 + 38 =
  5. 5.72 + 89 + 59 + 11 =
  6. 6.89 + 85 + 70 + 54 =
  7. 7.86 + 50 + 21 + 39 =
  8. 8.60 + 79 + 59 + 82 =
  9. 9.16 + 73 + 89 + 43 =
  10. 10.50 + 61 + 51 + 60 =
  11. 11.73 + 42 + 11 + 17 =
  12. 12.64 + 58 + 50 + 68 =
  13. 13.78 + 68 + 73 + 86 =
  14. 14.37 + 17 + 25 + 64 =
  15. 15.71 + 14 + 53 + 20 =
  16. 16.49 + 53 + 29 + 39 =
  17. 17.38 + 28 + 28 + 34 =
  18. 18.16 + 76 + 52 + 86 =
  19. 19.41 + 73 + 16 + 58 =
  20. 20.33 + 34 + 56 + 46 =
  21. 21.41 + 29 + 23 + 15 =
  22. 22.70 + 36 + 48 + 49 =
  23. 23.76 + 16 + 86 + 69 =
  24. 24.30 + 82 + 43 + 73 =
  25. 25.56 + 35 + 14 + 36 =
  26. 26.25 + 49 + 49 + 39 =
  27. 27.53 + 61 + 11 + 76 =
  28. 28.26 + 23 + 83 + 18 =
  29. 29.53 + 42 + 69 + 40 =
  30. 30.42 + 34 + 26 + 60 =
  31. 31.81 + 17 + 75 + 15 =
  32. 32.89 + 25 + 59 + 62 =
  33. 33.75 + 65 + 83 + 50 =
  34. 34.80 + 17 + 55 + 24 =
  35. 35.79 + 54 + 25 + 16 =
  36. 36.56 + 47 + 17 + 73 =
  37. 37.62 + 58 + 43 + 51 =
  38. 38.77 + 45 + 41 + 19 =
  39. 39.18 + 41 + 23 + 58 =
  40. 40.59 + 52 + 68 + 54 =

Answer key

  1. 213
  2. 227
  3. 128
  4. 213
  5. 231
  6. 298
  7. 196
  8. 280
  9. 221
  10. 222
  11. 143
  12. 240
  13. 305
  14. 143
  15. 158
  16. 170
  17. 128
  18. 230
  19. 188
  20. 169
  21. 108
  22. 203
  23. 247
  24. 228
  25. 141
  26. 162
  27. 201
  28. 150
  29. 204
  30. 162
  31. 188
  32. 235
  33. 273
  34. 176
  35. 174
  36. 193
  37. 214
  38. 182
  39. 140
  40. 233

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