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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 404 · 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. 1.76 + 84 + 24 + 76 =
  2. 2.47 + 76 + 38 + 78 =
  3. 3.58 + 25 + 66 + 81 =
  4. 4.69 + 19 + 27 + 21 =
  5. 5.49 + 71 + 81 + 77 =
  6. 6.43 + 28 + 48 + 35 =
  7. 7.32 + 88 + 36 + 82 =
  8. 8.18 + 28 + 89 + 56 =
  9. 9.82 + 67 + 47 + 55 =
  10. 10.20 + 77 + 76 + 24 =
  11. 11.35 + 56 + 85 + 69 =
  12. 12.60 + 68 + 30 + 62 =
  13. 13.73 + 45 + 21 + 73 =
  14. 14.12 + 32 + 55 + 26 =
  15. 15.73 + 30 + 27 + 33 =
  16. 16.34 + 12 + 38 + 14 =
  17. 17.89 + 73 + 54 + 69 =
  18. 18.42 + 16 + 81 + 28 =
  19. 19.23 + 79 + 27 + 41 =
  20. 20.53 + 67 + 66 + 38 =
  21. 21.12 + 46 + 80 + 12 =
  22. 22.36 + 85 + 48 + 87 =
  23. 23.36 + 85 + 46 + 88 =
  24. 24.84 + 68 + 21 + 65 =
  25. 25.64 + 79 + 17 + 77 =
  26. 26.89 + 74 + 21 + 66 =
  27. 27.89 + 63 + 64 + 50 =
  28. 28.66 + 60 + 12 + 53 =
  29. 29.12 + 60 + 14 + 62 =
  30. 30.26 + 62 + 72 + 78 =
  31. 31.55 + 62 + 31 + 52 =
  32. 32.54 + 74 + 73 + 58 =
  33. 33.19 + 65 + 15 + 60 =
  34. 34.72 + 74 + 41 + 15 =
  35. 35.73 + 29 + 68 + 42 =
  36. 36.74 + 43 + 29 + 35 =
  37. 37.14 + 56 + 51 + 16 =
  38. 38.57 + 22 + 76 + 19 =
  39. 39.66 + 29 + 29 + 49 =
  40. 40.58 + 77 + 58 + 39 =

Answer key

  1. 260
  2. 239
  3. 230
  4. 136
  5. 278
  6. 154
  7. 238
  8. 191
  9. 251
  10. 197
  11. 245
  12. 220
  13. 212
  14. 125
  15. 163
  16. 98
  17. 285
  18. 167
  19. 170
  20. 224
  21. 150
  22. 256
  23. 255
  24. 238
  25. 237
  26. 250
  27. 266
  28. 191
  29. 148
  30. 238
  31. 200
  32. 259
  33. 159
  34. 202
  35. 212
  36. 181
  37. 137
  38. 174
  39. 173
  40. 232

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