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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 306 · 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. 1.24 + 14 + 51 + 45 =
  2. 2.30 + 40 + 11 + 41 =
  3. 3.36 + 28 + 74 + 89 =
  4. 4.85 + 75 + 43 + 79 =
  5. 5.51 + 86 + 41 + 80 =
  6. 6.23 + 81 + 50 + 87 =
  7. 7.77 + 26 + 30 + 66 =
  8. 8.28 + 26 + 40 + 66 =
  9. 9.68 + 67 + 59 + 25 =
  10. 10.81 + 31 + 49 + 44 =
  11. 11.32 + 62 + 13 + 73 =
  12. 12.39 + 88 + 52 + 32 =
  13. 13.74 + 69 + 66 + 25 =
  14. 14.57 + 62 + 86 + 24 =
  15. 15.36 + 40 + 11 + 72 =
  16. 16.52 + 20 + 53 + 22 =
  17. 17.32 + 75 + 17 + 77 =
  18. 18.84 + 50 + 77 + 43 =
  19. 19.22 + 60 + 82 + 59 =
  20. 20.57 + 33 + 52 + 32 =
  21. 21.52 + 40 + 68 + 57 =
  22. 22.22 + 40 + 76 + 88 =
  23. 23.47 + 67 + 50 + 13 =
  24. 24.31 + 80 + 14 + 28 =
  25. 25.11 + 45 + 79 + 73 =
  26. 26.54 + 38 + 81 + 71 =
  27. 27.48 + 66 + 87 + 71 =
  28. 28.39 + 83 + 47 + 65 =
  29. 29.49 + 48 + 35 + 81 =
  30. 30.73 + 14 + 58 + 54 =
  31. 31.84 + 24 + 79 + 85 =
  32. 32.68 + 39 + 80 + 28 =
  33. 33.76 + 30 + 85 + 15 =
  34. 34.45 + 43 + 32 + 68 =
  35. 35.12 + 56 + 48 + 31 =
  36. 36.21 + 57 + 25 + 15 =
  37. 37.51 + 41 + 80 + 53 =
  38. 38.46 + 14 + 13 + 55 =
  39. 39.78 + 46 + 76 + 31 =
  40. 40.75 + 42 + 50 + 47 =

Answer key

  1. 134
  2. 122
  3. 227
  4. 282
  5. 258
  6. 241
  7. 199
  8. 160
  9. 219
  10. 205
  11. 180
  12. 211
  13. 234
  14. 229
  15. 159
  16. 147
  17. 201
  18. 254
  19. 223
  20. 174
  21. 217
  22. 226
  23. 177
  24. 153
  25. 208
  26. 244
  27. 272
  28. 234
  29. 213
  30. 199
  31. 272
  32. 215
  33. 206
  34. 188
  35. 147
  36. 118
  37. 225
  38. 128
  39. 231
  40. 214

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