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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 318 · 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. 1.67 + 81 + 60 + 71 =
  2. 2.24 + 33 + 33 + 56 =
  3. 3.72 + 45 + 52 + 70 =
  4. 4.14 + 70 + 29 + 34 =
  5. 5.24 + 59 + 14 + 28 =
  6. 6.69 + 49 + 82 + 78 =
  7. 7.14 + 39 + 27 + 20 =
  8. 8.51 + 49 + 13 + 30 =
  9. 9.49 + 12 + 81 + 89 =
  10. 10.40 + 51 + 25 + 12 =
  11. 11.43 + 60 + 67 + 53 =
  12. 12.34 + 59 + 60 + 34 =
  13. 13.43 + 32 + 57 + 76 =
  14. 14.26 + 19 + 17 + 80 =
  15. 15.17 + 89 + 77 + 19 =
  16. 16.41 + 13 + 15 + 71 =
  17. 17.55 + 23 + 13 + 74 =
  18. 18.24 + 60 + 19 + 36 =
  19. 19.66 + 46 + 59 + 41 =
  20. 20.11 + 31 + 34 + 22 =
  21. 21.50 + 17 + 58 + 23 =
  22. 22.13 + 61 + 25 + 69 =
  23. 23.22 + 66 + 16 + 45 =
  24. 24.74 + 47 + 61 + 41 =
  25. 25.32 + 50 + 59 + 88 =
  26. 26.44 + 35 + 28 + 30 =
  27. 27.47 + 88 + 74 + 77 =
  28. 28.27 + 26 + 31 + 45 =
  29. 29.14 + 76 + 51 + 26 =
  30. 30.45 + 51 + 36 + 22 =
  31. 31.13 + 15 + 75 + 29 =
  32. 32.52 + 28 + 89 + 73 =
  33. 33.28 + 61 + 49 + 70 =
  34. 34.29 + 61 + 52 + 59 =
  35. 35.14 + 41 + 75 + 41 =
  36. 36.54 + 53 + 70 + 84 =
  37. 37.28 + 30 + 43 + 47 =
  38. 38.59 + 12 + 30 + 65 =
  39. 39.66 + 11 + 73 + 57 =
  40. 40.23 + 60 + 11 + 31 =

Answer key

  1. 279
  2. 146
  3. 239
  4. 147
  5. 125
  6. 278
  7. 100
  8. 143
  9. 231
  10. 128
  11. 223
  12. 187
  13. 208
  14. 142
  15. 202
  16. 140
  17. 165
  18. 139
  19. 212
  20. 98
  21. 148
  22. 168
  23. 149
  24. 223
  25. 229
  26. 137
  27. 286
  28. 129
  29. 167
  30. 154
  31. 132
  32. 242
  33. 208
  34. 201
  35. 171
  36. 261
  37. 148
  38. 166
  39. 207
  40. 125

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