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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 623 · 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. 1.51 + 35 + 68 + 12 =
  2. 2.56 + 55 + 62 + 12 =
  3. 3.80 + 78 + 31 + 18 =
  4. 4.52 + 26 + 25 + 35 =
  5. 5.85 + 87 + 55 + 49 =
  6. 6.85 + 58 + 29 + 27 =
  7. 7.71 + 13 + 82 + 27 =
  8. 8.16 + 48 + 66 + 62 =
  9. 9.67 + 57 + 71 + 55 =
  10. 10.30 + 55 + 34 + 78 =
  11. 11.70 + 42 + 21 + 60 =
  12. 12.53 + 62 + 13 + 77 =
  13. 13.36 + 26 + 39 + 59 =
  14. 14.71 + 68 + 87 + 11 =
  15. 15.45 + 48 + 41 + 80 =
  16. 16.38 + 17 + 49 + 60 =
  17. 17.30 + 83 + 53 + 61 =
  18. 18.65 + 78 + 87 + 47 =
  19. 19.18 + 62 + 23 + 28 =
  20. 20.42 + 44 + 63 + 67 =
  21. 21.22 + 81 + 33 + 45 =
  22. 22.15 + 31 + 59 + 58 =
  23. 23.85 + 80 + 12 + 19 =
  24. 24.62 + 59 + 87 + 33 =
  25. 25.87 + 12 + 73 + 46 =
  26. 26.48 + 42 + 18 + 64 =
  27. 27.50 + 74 + 86 + 67 =
  28. 28.44 + 27 + 18 + 11 =
  29. 29.58 + 18 + 35 + 18 =
  30. 30.75 + 77 + 78 + 79 =
  31. 31.47 + 20 + 68 + 61 =
  32. 32.30 + 47 + 84 + 56 =
  33. 33.86 + 80 + 11 + 67 =
  34. 34.28 + 28 + 38 + 73 =
  35. 35.29 + 12 + 29 + 45 =
  36. 36.82 + 87 + 11 + 42 =
  37. 37.60 + 49 + 33 + 42 =
  38. 38.42 + 31 + 37 + 82 =
  39. 39.24 + 81 + 62 + 32 =
  40. 40.80 + 14 + 64 + 45 =

Answer key

  1. 166
  2. 185
  3. 207
  4. 138
  5. 276
  6. 199
  7. 193
  8. 192
  9. 250
  10. 197
  11. 193
  12. 205
  13. 160
  14. 237
  15. 214
  16. 164
  17. 227
  18. 277
  19. 131
  20. 216
  21. 181
  22. 163
  23. 196
  24. 241
  25. 218
  26. 172
  27. 277
  28. 100
  29. 129
  30. 309
  31. 196
  32. 217
  33. 244
  34. 167
  35. 115
  36. 222
  37. 184
  38. 192
  39. 199
  40. 203

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