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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 911 · 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. 1.50 + 69 + 15 + 78 =
  2. 2.30 + 78 + 36 + 86 =
  3. 3.39 + 45 + 32 + 84 =
  4. 4.63 + 88 + 28 + 81 =
  5. 5.53 + 36 + 41 + 59 =
  6. 6.53 + 54 + 18 + 50 =
  7. 7.88 + 18 + 42 + 48 =
  8. 8.81 + 32 + 16 + 80 =
  9. 9.51 + 55 + 14 + 44 =
  10. 10.75 + 65 + 40 + 42 =
  11. 11.64 + 29 + 81 + 46 =
  12. 12.41 + 44 + 24 + 87 =
  13. 13.52 + 81 + 62 + 71 =
  14. 14.33 + 38 + 30 + 62 =
  15. 15.15 + 61 + 11 + 17 =
  16. 16.48 + 70 + 77 + 84 =
  17. 17.37 + 17 + 88 + 12 =
  18. 18.17 + 59 + 12 + 69 =
  19. 19.83 + 61 + 87 + 31 =
  20. 20.44 + 77 + 77 + 25 =
  21. 21.12 + 21 + 69 + 31 =
  22. 22.51 + 77 + 24 + 29 =
  23. 23.77 + 21 + 28 + 56 =
  24. 24.28 + 42 + 65 + 79 =
  25. 25.38 + 77 + 87 + 38 =
  26. 26.46 + 35 + 14 + 21 =
  27. 27.38 + 30 + 43 + 32 =
  28. 28.40 + 19 + 20 + 86 =
  29. 29.47 + 39 + 78 + 19 =
  30. 30.52 + 11 + 19 + 32 =
  31. 31.29 + 40 + 65 + 27 =
  32. 32.37 + 55 + 76 + 30 =
  33. 33.51 + 31 + 43 + 32 =
  34. 34.46 + 25 + 19 + 39 =
  35. 35.48 + 47 + 54 + 56 =
  36. 36.44 + 85 + 18 + 79 =
  37. 37.27 + 67 + 41 + 47 =
  38. 38.14 + 18 + 44 + 71 =
  39. 39.50 + 17 + 30 + 74 =
  40. 40.25 + 33 + 31 + 80 =

Answer key

  1. 212
  2. 230
  3. 200
  4. 260
  5. 189
  6. 175
  7. 196
  8. 209
  9. 164
  10. 222
  11. 220
  12. 196
  13. 266
  14. 163
  15. 104
  16. 279
  17. 154
  18. 157
  19. 262
  20. 223
  21. 133
  22. 181
  23. 182
  24. 214
  25. 240
  26. 116
  27. 143
  28. 165
  29. 183
  30. 114
  31. 161
  32. 198
  33. 157
  34. 129
  35. 205
  36. 226
  37. 182
  38. 147
  39. 171
  40. 169

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