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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 940 · 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. 1.83 + 71 + 67 + 67 =
  2. 2.41 + 30 + 76 + 86 =
  3. 3.25 + 62 + 14 + 48 =
  4. 4.43 + 41 + 56 + 64 =
  5. 5.77 + 50 + 26 + 19 =
  6. 6.50 + 47 + 76 + 71 =
  7. 7.88 + 24 + 51 + 16 =
  8. 8.77 + 74 + 13 + 78 =
  9. 9.83 + 49 + 31 + 78 =
  10. 10.56 + 36 + 66 + 14 =
  11. 11.60 + 13 + 52 + 36 =
  12. 12.38 + 76 + 79 + 70 =
  13. 13.76 + 64 + 87 + 48 =
  14. 14.60 + 57 + 62 + 15 =
  15. 15.75 + 43 + 45 + 29 =
  16. 16.80 + 33 + 41 + 27 =
  17. 17.71 + 15 + 35 + 69 =
  18. 18.89 + 48 + 80 + 25 =
  19. 19.66 + 20 + 74 + 27 =
  20. 20.34 + 31 + 12 + 19 =
  21. 21.36 + 30 + 25 + 53 =
  22. 22.14 + 26 + 69 + 71 =
  23. 23.77 + 16 + 35 + 38 =
  24. 24.56 + 33 + 85 + 55 =
  25. 25.66 + 71 + 15 + 57 =
  26. 26.24 + 23 + 47 + 39 =
  27. 27.51 + 74 + 59 + 85 =
  28. 28.17 + 54 + 17 + 62 =
  29. 29.28 + 52 + 15 + 41 =
  30. 30.35 + 42 + 21 + 48 =
  31. 31.85 + 18 + 52 + 32 =
  32. 32.48 + 73 + 34 + 72 =
  33. 33.37 + 24 + 31 + 59 =
  34. 34.45 + 53 + 12 + 60 =
  35. 35.78 + 29 + 39 + 60 =
  36. 36.71 + 51 + 34 + 44 =
  37. 37.32 + 33 + 64 + 73 =
  38. 38.29 + 46 + 33 + 25 =
  39. 39.23 + 23 + 76 + 85 =
  40. 40.45 + 31 + 15 + 72 =

Answer key

  1. 288
  2. 233
  3. 149
  4. 204
  5. 172
  6. 244
  7. 179
  8. 242
  9. 241
  10. 172
  11. 161
  12. 263
  13. 275
  14. 194
  15. 192
  16. 181
  17. 190
  18. 242
  19. 187
  20. 96
  21. 144
  22. 180
  23. 166
  24. 229
  25. 209
  26. 133
  27. 269
  28. 150
  29. 136
  30. 146
  31. 187
  32. 227
  33. 151
  34. 170
  35. 206
  36. 200
  37. 202
  38. 133
  39. 207
  40. 163

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