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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 993 · 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. 1.12 + 33 + 67 + 32 =
  2. 2.75 + 25 + 79 + 88 =
  3. 3.11 + 62 + 29 + 23 =
  4. 4.26 + 18 + 47 + 75 =
  5. 5.49 + 64 + 86 + 32 =
  6. 6.68 + 44 + 43 + 88 =
  7. 7.42 + 89 + 87 + 51 =
  8. 8.88 + 45 + 69 + 15 =
  9. 9.88 + 26 + 25 + 74 =
  10. 10.34 + 47 + 11 + 46 =
  11. 11.25 + 81 + 74 + 26 =
  12. 12.34 + 79 + 52 + 23 =
  13. 13.14 + 66 + 49 + 23 =
  14. 14.21 + 49 + 62 + 47 =
  15. 15.30 + 42 + 49 + 36 =
  16. 16.80 + 23 + 44 + 78 =
  17. 17.27 + 73 + 46 + 76 =
  18. 18.25 + 45 + 62 + 26 =
  19. 19.17 + 16 + 87 + 21 =
  20. 20.81 + 21 + 55 + 20 =
  21. 21.17 + 45 + 43 + 60 =
  22. 22.81 + 54 + 55 + 20 =
  23. 23.23 + 69 + 34 + 19 =
  24. 24.35 + 54 + 41 + 54 =
  25. 25.33 + 13 + 26 + 45 =
  26. 26.27 + 68 + 76 + 86 =
  27. 27.25 + 78 + 55 + 47 =
  28. 28.62 + 71 + 39 + 19 =
  29. 29.62 + 45 + 43 + 13 =
  30. 30.84 + 11 + 45 + 44 =
  31. 31.55 + 84 + 26 + 31 =
  32. 32.36 + 26 + 77 + 44 =
  33. 33.49 + 22 + 18 + 56 =
  34. 34.18 + 13 + 74 + 20 =
  35. 35.26 + 35 + 27 + 22 =
  36. 36.89 + 74 + 73 + 39 =
  37. 37.12 + 66 + 22 + 46 =
  38. 38.12 + 74 + 30 + 26 =
  39. 39.68 + 37 + 72 + 54 =
  40. 40.37 + 31 + 81 + 77 =

Answer key

  1. 144
  2. 267
  3. 125
  4. 166
  5. 231
  6. 243
  7. 269
  8. 217
  9. 213
  10. 138
  11. 206
  12. 188
  13. 152
  14. 179
  15. 157
  16. 225
  17. 222
  18. 158
  19. 141
  20. 177
  21. 165
  22. 210
  23. 145
  24. 184
  25. 117
  26. 257
  27. 205
  28. 191
  29. 163
  30. 184
  31. 196
  32. 183
  33. 145
  34. 125
  35. 110
  36. 275
  37. 146
  38. 142
  39. 231
  40. 226

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