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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 380 · 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. 1.78 + 37 + 38 + 24 =
  2. 2.77 + 42 + 88 + 69 =
  3. 3.18 + 77 + 70 + 16 =
  4. 4.58 + 29 + 71 + 50 =
  5. 5.17 + 86 + 88 + 83 =
  6. 6.16 + 17 + 48 + 21 =
  7. 7.26 + 68 + 32 + 18 =
  8. 8.28 + 44 + 17 + 64 =
  9. 9.53 + 77 + 37 + 77 =
  10. 10.24 + 31 + 79 + 35 =
  11. 11.88 + 41 + 19 + 85 =
  12. 12.34 + 16 + 47 + 15 =
  13. 13.82 + 24 + 77 + 29 =
  14. 14.52 + 78 + 66 + 36 =
  15. 15.22 + 41 + 84 + 64 =
  16. 16.29 + 15 + 87 + 66 =
  17. 17.19 + 32 + 42 + 67 =
  18. 18.33 + 45 + 71 + 89 =
  19. 19.19 + 58 + 23 + 25 =
  20. 20.41 + 72 + 18 + 19 =
  21. 21.11 + 72 + 31 + 41 =
  22. 22.21 + 75 + 41 + 55 =
  23. 23.77 + 19 + 35 + 68 =
  24. 24.76 + 44 + 87 + 41 =
  25. 25.27 + 83 + 52 + 30 =
  26. 26.13 + 48 + 46 + 54 =
  27. 27.73 + 83 + 41 + 49 =
  28. 28.26 + 57 + 40 + 51 =
  29. 29.62 + 53 + 23 + 78 =
  30. 30.33 + 50 + 83 + 34 =
  31. 31.15 + 23 + 81 + 21 =
  32. 32.69 + 53 + 49 + 80 =
  33. 33.42 + 37 + 42 + 42 =
  34. 34.87 + 24 + 18 + 57 =
  35. 35.73 + 85 + 42 + 27 =
  36. 36.12 + 32 + 14 + 64 =
  37. 37.43 + 31 + 66 + 53 =
  38. 38.41 + 48 + 11 + 31 =
  39. 39.15 + 81 + 64 + 67 =
  40. 40.25 + 24 + 35 + 31 =

Answer key

  1. 177
  2. 276
  3. 181
  4. 208
  5. 274
  6. 102
  7. 144
  8. 153
  9. 244
  10. 169
  11. 233
  12. 112
  13. 212
  14. 232
  15. 211
  16. 197
  17. 160
  18. 238
  19. 125
  20. 150
  21. 155
  22. 192
  23. 199
  24. 248
  25. 192
  26. 161
  27. 246
  28. 174
  29. 216
  30. 200
  31. 140
  32. 251
  33. 163
  34. 186
  35. 227
  36. 122
  37. 193
  38. 131
  39. 227
  40. 115

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