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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 326 · 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. 1.61 + 53 + 56 + 21 =
  2. 2.51 + 54 + 58 + 55 =
  3. 3.61 + 49 + 89 + 72 =
  4. 4.65 + 17 + 38 + 36 =
  5. 5.66 + 59 + 43 + 46 =
  6. 6.21 + 43 + 42 + 44 =
  7. 7.49 + 16 + 50 + 43 =
  8. 8.37 + 68 + 42 + 29 =
  9. 9.44 + 22 + 75 + 67 =
  10. 10.87 + 17 + 44 + 60 =
  11. 11.38 + 59 + 21 + 41 =
  12. 12.46 + 27 + 13 + 63 =
  13. 13.63 + 79 + 27 + 29 =
  14. 14.70 + 53 + 82 + 35 =
  15. 15.23 + 57 + 13 + 79 =
  16. 16.44 + 57 + 42 + 67 =
  17. 17.64 + 26 + 42 + 69 =
  18. 18.75 + 64 + 34 + 13 =
  19. 19.51 + 23 + 68 + 27 =
  20. 20.21 + 89 + 45 + 45 =
  21. 21.49 + 62 + 30 + 40 =
  22. 22.15 + 32 + 14 + 15 =
  23. 23.29 + 56 + 77 + 47 =
  24. 24.64 + 15 + 18 + 62 =
  25. 25.89 + 15 + 51 + 50 =
  26. 26.87 + 84 + 29 + 68 =
  27. 27.15 + 27 + 55 + 19 =
  28. 28.57 + 59 + 59 + 15 =
  29. 29.30 + 50 + 20 + 82 =
  30. 30.87 + 29 + 74 + 48 =
  31. 31.13 + 33 + 30 + 22 =
  32. 32.33 + 28 + 49 + 44 =
  33. 33.85 + 21 + 84 + 76 =
  34. 34.87 + 52 + 16 + 57 =
  35. 35.39 + 63 + 53 + 49 =
  36. 36.15 + 36 + 47 + 65 =
  37. 37.79 + 82 + 79 + 39 =
  38. 38.89 + 27 + 25 + 21 =
  39. 39.23 + 56 + 34 + 44 =
  40. 40.14 + 19 + 70 + 33 =

Answer key

  1. 191
  2. 218
  3. 271
  4. 156
  5. 214
  6. 150
  7. 158
  8. 176
  9. 208
  10. 208
  11. 159
  12. 149
  13. 198
  14. 240
  15. 172
  16. 210
  17. 201
  18. 186
  19. 169
  20. 200
  21. 181
  22. 76
  23. 209
  24. 159
  25. 205
  26. 268
  27. 116
  28. 190
  29. 182
  30. 238
  31. 98
  32. 154
  33. 266
  34. 212
  35. 204
  36. 163
  37. 279
  38. 162
  39. 157
  40. 136

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