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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 42 · 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. 1.15 + 65 + 70 + 44 =
  2. 2.40 + 24 + 22 + 63 =
  3. 3.18 + 25 + 45 + 65 =
  4. 4.64 + 53 + 89 + 72 =
  5. 5.87 + 86 + 75 + 12 =
  6. 6.40 + 52 + 31 + 41 =
  7. 7.31 + 84 + 70 + 52 =
  8. 8.82 + 44 + 27 + 17 =
  9. 9.64 + 30 + 28 + 28 =
  10. 10.82 + 19 + 41 + 75 =
  11. 11.36 + 13 + 12 + 34 =
  12. 12.60 + 88 + 59 + 32 =
  13. 13.22 + 17 + 62 + 68 =
  14. 14.34 + 66 + 67 + 70 =
  15. 15.85 + 24 + 30 + 89 =
  16. 16.31 + 12 + 63 + 68 =
  17. 17.14 + 68 + 17 + 14 =
  18. 18.73 + 80 + 54 + 24 =
  19. 19.54 + 39 + 84 + 24 =
  20. 20.32 + 59 + 12 + 41 =
  21. 21.12 + 44 + 16 + 28 =
  22. 22.56 + 66 + 45 + 77 =
  23. 23.59 + 74 + 50 + 25 =
  24. 24.79 + 55 + 79 + 24 =
  25. 25.47 + 63 + 69 + 83 =
  26. 26.86 + 26 + 64 + 30 =
  27. 27.22 + 42 + 86 + 65 =
  28. 28.27 + 34 + 33 + 80 =
  29. 29.21 + 15 + 58 + 12 =
  30. 30.70 + 51 + 62 + 76 =
  31. 31.43 + 86 + 30 + 77 =
  32. 32.61 + 20 + 41 + 33 =
  33. 33.41 + 14 + 15 + 55 =
  34. 34.39 + 66 + 37 + 43 =
  35. 35.66 + 74 + 27 + 29 =
  36. 36.45 + 38 + 54 + 40 =
  37. 37.84 + 11 + 17 + 59 =
  38. 38.61 + 63 + 86 + 87 =
  39. 39.40 + 77 + 47 + 35 =
  40. 40.37 + 17 + 16 + 24 =

Answer key

  1. 194
  2. 149
  3. 153
  4. 278
  5. 260
  6. 164
  7. 237
  8. 170
  9. 150
  10. 217
  11. 95
  12. 239
  13. 169
  14. 237
  15. 228
  16. 174
  17. 113
  18. 231
  19. 201
  20. 144
  21. 100
  22. 244
  23. 208
  24. 237
  25. 262
  26. 206
  27. 215
  28. 174
  29. 106
  30. 259
  31. 236
  32. 155
  33. 125
  34. 185
  35. 196
  36. 177
  37. 171
  38. 297
  39. 199
  40. 94

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