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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 445 · 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. 1.54 + 64 + 60 + 22 =
  2. 2.66 + 19 + 29 + 24 =
  3. 3.43 + 81 + 76 + 65 =
  4. 4.15 + 85 + 16 + 78 =
  5. 5.82 + 58 + 58 + 19 =
  6. 6.69 + 81 + 44 + 87 =
  7. 7.74 + 56 + 60 + 49 =
  8. 8.84 + 58 + 63 + 17 =
  9. 9.14 + 88 + 57 + 54 =
  10. 10.73 + 66 + 22 + 53 =
  11. 11.62 + 66 + 20 + 26 =
  12. 12.33 + 17 + 24 + 36 =
  13. 13.23 + 49 + 67 + 69 =
  14. 14.71 + 34 + 85 + 61 =
  15. 15.23 + 82 + 20 + 79 =
  16. 16.34 + 79 + 15 + 30 =
  17. 17.49 + 62 + 62 + 65 =
  18. 18.63 + 49 + 52 + 45 =
  19. 19.36 + 87 + 15 + 49 =
  20. 20.17 + 17 + 29 + 48 =
  21. 21.83 + 18 + 53 + 20 =
  22. 22.79 + 17 + 20 + 24 =
  23. 23.26 + 77 + 56 + 17 =
  24. 24.22 + 82 + 81 + 27 =
  25. 25.47 + 71 + 31 + 40 =
  26. 26.21 + 43 + 18 + 21 =
  27. 27.49 + 27 + 65 + 76 =
  28. 28.84 + 79 + 69 + 12 =
  29. 29.36 + 59 + 46 + 89 =
  30. 30.61 + 53 + 74 + 18 =
  31. 31.29 + 68 + 16 + 80 =
  32. 32.85 + 49 + 64 + 16 =
  33. 33.23 + 44 + 43 + 20 =
  34. 34.20 + 65 + 31 + 53 =
  35. 35.11 + 84 + 27 + 57 =
  36. 36.71 + 32 + 84 + 25 =
  37. 37.29 + 34 + 51 + 41 =
  38. 38.55 + 81 + 16 + 41 =
  39. 39.80 + 34 + 75 + 45 =
  40. 40.46 + 88 + 30 + 35 =

Answer key

  1. 200
  2. 138
  3. 265
  4. 194
  5. 217
  6. 281
  7. 239
  8. 222
  9. 213
  10. 214
  11. 174
  12. 110
  13. 208
  14. 251
  15. 204
  16. 158
  17. 238
  18. 209
  19. 187
  20. 111
  21. 174
  22. 140
  23. 176
  24. 212
  25. 189
  26. 103
  27. 217
  28. 244
  29. 230
  30. 206
  31. 193
  32. 214
  33. 130
  34. 169
  35. 179
  36. 212
  37. 155
  38. 193
  39. 234
  40. 199

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