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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 661 · 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. 1.48 + 88 + 42 + 51 =
  2. 2.33 + 52 + 59 + 14 =
  3. 3.14 + 26 + 36 + 85 =
  4. 4.28 + 34 + 39 + 43 =
  5. 5.89 + 17 + 78 + 89 =
  6. 6.87 + 17 + 52 + 70 =
  7. 7.13 + 63 + 44 + 11 =
  8. 8.16 + 48 + 60 + 89 =
  9. 9.39 + 58 + 39 + 24 =
  10. 10.12 + 43 + 78 + 41 =
  11. 11.52 + 76 + 48 + 77 =
  12. 12.75 + 81 + 43 + 37 =
  13. 13.13 + 37 + 33 + 27 =
  14. 14.17 + 14 + 81 + 32 =
  15. 15.26 + 31 + 39 + 77 =
  16. 16.67 + 65 + 20 + 16 =
  17. 17.37 + 82 + 67 + 31 =
  18. 18.67 + 35 + 17 + 88 =
  19. 19.72 + 14 + 42 + 64 =
  20. 20.50 + 32 + 25 + 72 =
  21. 21.67 + 56 + 50 + 39 =
  22. 22.37 + 40 + 25 + 80 =
  23. 23.82 + 27 + 14 + 24 =
  24. 24.66 + 70 + 13 + 84 =
  25. 25.83 + 56 + 67 + 77 =
  26. 26.87 + 15 + 55 + 20 =
  27. 27.69 + 18 + 84 + 88 =
  28. 28.29 + 14 + 13 + 54 =
  29. 29.59 + 17 + 61 + 86 =
  30. 30.84 + 66 + 88 + 26 =
  31. 31.85 + 59 + 55 + 77 =
  32. 32.19 + 18 + 13 + 21 =
  33. 33.77 + 24 + 53 + 53 =
  34. 34.23 + 29 + 65 + 34 =
  35. 35.23 + 73 + 89 + 68 =
  36. 36.23 + 22 + 13 + 56 =
  37. 37.21 + 13 + 81 + 44 =
  38. 38.73 + 23 + 50 + 34 =
  39. 39.67 + 23 + 69 + 42 =
  40. 40.27 + 67 + 65 + 57 =

Answer key

  1. 229
  2. 158
  3. 161
  4. 144
  5. 273
  6. 226
  7. 131
  8. 213
  9. 160
  10. 174
  11. 253
  12. 236
  13. 110
  14. 144
  15. 173
  16. 168
  17. 217
  18. 207
  19. 192
  20. 179
  21. 212
  22. 182
  23. 147
  24. 233
  25. 283
  26. 177
  27. 259
  28. 110
  29. 223
  30. 264
  31. 276
  32. 71
  33. 207
  34. 151
  35. 253
  36. 114
  37. 159
  38. 180
  39. 201
  40. 216

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