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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 147 · 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. 1.37 + 31 + 86 + 77 =
  2. 2.76 + 67 + 41 + 12 =
  3. 3.33 + 20 + 65 + 76 =
  4. 4.41 + 43 + 46 + 63 =
  5. 5.87 + 75 + 52 + 47 =
  6. 6.28 + 55 + 17 + 20 =
  7. 7.64 + 69 + 11 + 64 =
  8. 8.61 + 20 + 37 + 38 =
  9. 9.17 + 70 + 11 + 60 =
  10. 10.61 + 87 + 81 + 76 =
  11. 11.48 + 71 + 15 + 30 =
  12. 12.18 + 75 + 39 + 17 =
  13. 13.34 + 13 + 11 + 25 =
  14. 14.61 + 17 + 30 + 30 =
  15. 15.39 + 54 + 14 + 52 =
  16. 16.59 + 81 + 34 + 77 =
  17. 17.50 + 85 + 50 + 39 =
  18. 18.50 + 30 + 74 + 23 =
  19. 19.71 + 19 + 33 + 27 =
  20. 20.71 + 25 + 14 + 13 =
  21. 21.30 + 62 + 39 + 16 =
  22. 22.27 + 49 + 52 + 25 =
  23. 23.54 + 11 + 81 + 82 =
  24. 24.37 + 47 + 41 + 87 =
  25. 25.18 + 75 + 47 + 53 =
  26. 26.15 + 61 + 30 + 32 =
  27. 27.71 + 77 + 46 + 35 =
  28. 28.47 + 82 + 16 + 44 =
  29. 29.20 + 50 + 24 + 21 =
  30. 30.83 + 68 + 83 + 76 =
  31. 31.57 + 81 + 31 + 86 =
  32. 32.84 + 82 + 65 + 18 =
  33. 33.11 + 12 + 49 + 67 =
  34. 34.49 + 87 + 67 + 55 =
  35. 35.77 + 75 + 54 + 62 =
  36. 36.63 + 47 + 58 + 53 =
  37. 37.89 + 69 + 24 + 34 =
  38. 38.36 + 38 + 24 + 67 =
  39. 39.66 + 71 + 77 + 75 =
  40. 40.39 + 28 + 27 + 65 =

Answer key

  1. 231
  2. 196
  3. 194
  4. 193
  5. 261
  6. 120
  7. 208
  8. 156
  9. 158
  10. 305
  11. 164
  12. 149
  13. 83
  14. 138
  15. 159
  16. 251
  17. 224
  18. 177
  19. 150
  20. 123
  21. 147
  22. 153
  23. 228
  24. 212
  25. 193
  26. 138
  27. 229
  28. 189
  29. 115
  30. 310
  31. 255
  32. 249
  33. 139
  34. 258
  35. 268
  36. 221
  37. 216
  38. 165
  39. 289
  40. 159

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