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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 983 · 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. 1.34 + 43 + 36 + 18 =
  2. 2.32 + 81 + 67 + 40 =
  3. 3.57 + 53 + 89 + 16 =
  4. 4.70 + 49 + 72 + 82 =
  5. 5.58 + 61 + 77 + 13 =
  6. 6.68 + 89 + 58 + 31 =
  7. 7.56 + 43 + 32 + 68 =
  8. 8.51 + 26 + 83 + 20 =
  9. 9.53 + 63 + 85 + 13 =
  10. 10.12 + 66 + 72 + 34 =
  11. 11.86 + 62 + 34 + 19 =
  12. 12.33 + 34 + 43 + 33 =
  13. 13.17 + 19 + 38 + 12 =
  14. 14.77 + 50 + 11 + 36 =
  15. 15.59 + 62 + 89 + 29 =
  16. 16.83 + 20 + 77 + 41 =
  17. 17.78 + 73 + 21 + 16 =
  18. 18.79 + 58 + 33 + 85 =
  19. 19.54 + 11 + 47 + 65 =
  20. 20.24 + 86 + 19 + 41 =
  21. 21.63 + 45 + 82 + 56 =
  22. 22.13 + 70 + 16 + 50 =
  23. 23.39 + 71 + 88 + 34 =
  24. 24.51 + 32 + 47 + 48 =
  25. 25.59 + 25 + 31 + 12 =
  26. 26.39 + 11 + 63 + 47 =
  27. 27.71 + 19 + 44 + 56 =
  28. 28.14 + 44 + 47 + 63 =
  29. 29.38 + 24 + 44 + 24 =
  30. 30.74 + 54 + 80 + 14 =
  31. 31.55 + 11 + 87 + 43 =
  32. 32.14 + 87 + 56 + 24 =
  33. 33.76 + 84 + 53 + 78 =
  34. 34.64 + 28 + 75 + 11 =
  35. 35.56 + 34 + 83 + 60 =
  36. 36.36 + 14 + 81 + 41 =
  37. 37.43 + 76 + 60 + 31 =
  38. 38.46 + 20 + 73 + 31 =
  39. 39.23 + 89 + 53 + 55 =
  40. 40.16 + 19 + 58 + 53 =

Answer key

  1. 131
  2. 220
  3. 215
  4. 273
  5. 209
  6. 246
  7. 199
  8. 180
  9. 214
  10. 184
  11. 201
  12. 143
  13. 86
  14. 174
  15. 239
  16. 221
  17. 188
  18. 255
  19. 177
  20. 170
  21. 246
  22. 149
  23. 232
  24. 178
  25. 127
  26. 160
  27. 190
  28. 168
  29. 130
  30. 222
  31. 196
  32. 181
  33. 291
  34. 178
  35. 233
  36. 172
  37. 210
  38. 170
  39. 220
  40. 146

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