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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 852 · 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. 1.23 + 22 + 42 + 65 =
  2. 2.63 + 79 + 12 + 52 =
  3. 3.13 + 61 + 11 + 21 =
  4. 4.19 + 24 + 13 + 12 =
  5. 5.16 + 25 + 66 + 73 =
  6. 6.71 + 37 + 37 + 15 =
  7. 7.25 + 71 + 17 + 71 =
  8. 8.82 + 38 + 37 + 14 =
  9. 9.55 + 15 + 36 + 31 =
  10. 10.84 + 21 + 32 + 62 =
  11. 11.18 + 38 + 34 + 60 =
  12. 12.63 + 59 + 88 + 53 =
  13. 13.74 + 69 + 81 + 38 =
  14. 14.67 + 35 + 89 + 66 =
  15. 15.77 + 31 + 29 + 74 =
  16. 16.20 + 79 + 51 + 81 =
  17. 17.28 + 21 + 24 + 70 =
  18. 18.32 + 82 + 77 + 19 =
  19. 19.37 + 84 + 72 + 37 =
  20. 20.71 + 55 + 83 + 31 =
  21. 21.19 + 78 + 47 + 19 =
  22. 22.14 + 70 + 14 + 72 =
  23. 23.78 + 71 + 89 + 71 =
  24. 24.49 + 77 + 66 + 61 =
  25. 25.63 + 59 + 76 + 86 =
  26. 26.67 + 21 + 56 + 55 =
  27. 27.20 + 22 + 71 + 49 =
  28. 28.72 + 71 + 39 + 47 =
  29. 29.76 + 79 + 68 + 25 =
  30. 30.83 + 37 + 86 + 32 =
  31. 31.44 + 61 + 80 + 21 =
  32. 32.42 + 41 + 29 + 86 =
  33. 33.65 + 37 + 68 + 18 =
  34. 34.73 + 61 + 89 + 39 =
  35. 35.22 + 45 + 38 + 42 =
  36. 36.48 + 23 + 40 + 28 =
  37. 37.45 + 28 + 62 + 89 =
  38. 38.11 + 17 + 30 + 12 =
  39. 39.18 + 17 + 20 + 21 =
  40. 40.24 + 29 + 30 + 78 =

Answer key

  1. 152
  2. 206
  3. 106
  4. 68
  5. 180
  6. 160
  7. 184
  8. 171
  9. 137
  10. 199
  11. 150
  12. 263
  13. 262
  14. 257
  15. 211
  16. 231
  17. 143
  18. 210
  19. 230
  20. 240
  21. 163
  22. 170
  23. 309
  24. 253
  25. 284
  26. 199
  27. 162
  28. 229
  29. 248
  30. 238
  31. 206
  32. 198
  33. 188
  34. 262
  35. 147
  36. 139
  37. 224
  38. 70
  39. 76
  40. 161

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