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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 771 · 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. 1.30 + 70 + 66 + 84 =
  2. 2.15 + 32 + 56 + 32 =
  3. 3.35 + 79 + 33 + 54 =
  4. 4.84 + 38 + 27 + 56 =
  5. 5.74 + 38 + 71 + 39 =
  6. 6.88 + 25 + 32 + 82 =
  7. 7.13 + 59 + 36 + 50 =
  8. 8.58 + 37 + 31 + 86 =
  9. 9.36 + 20 + 80 + 41 =
  10. 10.67 + 74 + 73 + 81 =
  11. 11.11 + 64 + 34 + 63 =
  12. 12.14 + 75 + 64 + 72 =
  13. 13.61 + 43 + 55 + 57 =
  14. 14.23 + 23 + 26 + 73 =
  15. 15.66 + 62 + 50 + 68 =
  16. 16.22 + 42 + 32 + 77 =
  17. 17.75 + 83 + 84 + 35 =
  18. 18.49 + 25 + 56 + 76 =
  19. 19.13 + 80 + 20 + 26 =
  20. 20.33 + 45 + 11 + 21 =
  21. 21.27 + 47 + 34 + 82 =
  22. 22.32 + 45 + 89 + 22 =
  23. 23.89 + 65 + 18 + 55 =
  24. 24.30 + 74 + 25 + 43 =
  25. 25.81 + 33 + 26 + 58 =
  26. 26.11 + 52 + 52 + 59 =
  27. 27.62 + 59 + 42 + 56 =
  28. 28.23 + 86 + 39 + 53 =
  29. 29.89 + 37 + 71 + 26 =
  30. 30.21 + 81 + 88 + 86 =
  31. 31.70 + 26 + 40 + 13 =
  32. 32.29 + 86 + 83 + 25 =
  33. 33.18 + 61 + 32 + 37 =
  34. 34.53 + 32 + 26 + 21 =
  35. 35.73 + 74 + 42 + 79 =
  36. 36.57 + 56 + 62 + 52 =
  37. 37.70 + 67 + 13 + 12 =
  38. 38.76 + 89 + 52 + 18 =
  39. 39.32 + 49 + 54 + 17 =
  40. 40.23 + 28 + 47 + 41 =

Answer key

  1. 250
  2. 135
  3. 201
  4. 205
  5. 222
  6. 227
  7. 158
  8. 212
  9. 177
  10. 295
  11. 172
  12. 225
  13. 216
  14. 145
  15. 246
  16. 173
  17. 277
  18. 206
  19. 139
  20. 110
  21. 190
  22. 188
  23. 227
  24. 172
  25. 198
  26. 174
  27. 219
  28. 201
  29. 223
  30. 276
  31. 149
  32. 223
  33. 148
  34. 132
  35. 268
  36. 227
  37. 162
  38. 235
  39. 152
  40. 139

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