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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 962 · 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. 1.67 + 24 + 25 + 27 =
  2. 2.26 + 25 + 24 + 46 =
  3. 3.53 + 17 + 18 + 70 =
  4. 4.33 + 65 + 64 + 16 =
  5. 5.84 + 62 + 26 + 31 =
  6. 6.87 + 18 + 23 + 27 =
  7. 7.16 + 81 + 47 + 88 =
  8. 8.63 + 24 + 50 + 41 =
  9. 9.45 + 13 + 16 + 59 =
  10. 10.43 + 89 + 39 + 41 =
  11. 11.15 + 73 + 65 + 16 =
  12. 12.42 + 58 + 38 + 76 =
  13. 13.71 + 55 + 42 + 43 =
  14. 14.59 + 85 + 88 + 79 =
  15. 15.17 + 72 + 70 + 30 =
  16. 16.66 + 49 + 81 + 26 =
  17. 17.17 + 30 + 16 + 76 =
  18. 18.23 + 80 + 57 + 58 =
  19. 19.57 + 83 + 20 + 34 =
  20. 20.62 + 75 + 15 + 20 =
  21. 21.43 + 17 + 32 + 27 =
  22. 22.55 + 17 + 13 + 47 =
  23. 23.74 + 22 + 55 + 28 =
  24. 24.86 + 22 + 78 + 82 =
  25. 25.44 + 78 + 25 + 44 =
  26. 26.27 + 62 + 62 + 14 =
  27. 27.73 + 58 + 77 + 54 =
  28. 28.38 + 21 + 15 + 61 =
  29. 29.42 + 14 + 78 + 85 =
  30. 30.53 + 85 + 67 + 64 =
  31. 31.60 + 22 + 67 + 30 =
  32. 32.45 + 39 + 81 + 76 =
  33. 33.32 + 25 + 18 + 80 =
  34. 34.48 + 12 + 15 + 29 =
  35. 35.69 + 50 + 28 + 16 =
  36. 36.84 + 60 + 30 + 25 =
  37. 37.19 + 16 + 21 + 85 =
  38. 38.25 + 83 + 87 + 13 =
  39. 39.46 + 40 + 38 + 38 =
  40. 40.21 + 64 + 28 + 73 =

Answer key

  1. 143
  2. 121
  3. 158
  4. 178
  5. 203
  6. 155
  7. 232
  8. 178
  9. 133
  10. 212
  11. 169
  12. 214
  13. 211
  14. 311
  15. 189
  16. 222
  17. 139
  18. 218
  19. 194
  20. 172
  21. 119
  22. 132
  23. 179
  24. 268
  25. 191
  26. 165
  27. 262
  28. 135
  29. 219
  30. 269
  31. 179
  32. 241
  33. 155
  34. 104
  35. 163
  36. 199
  37. 141
  38. 208
  39. 162
  40. 186

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