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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 278 · 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. 1.61 + 71 + 14 + 36 =
  2. 2.62 + 87 + 15 + 73 =
  3. 3.44 + 59 + 29 + 65 =
  4. 4.76 + 50 + 26 + 54 =
  5. 5.15 + 27 + 13 + 81 =
  6. 6.50 + 85 + 59 + 30 =
  7. 7.23 + 17 + 53 + 46 =
  8. 8.86 + 67 + 82 + 89 =
  9. 9.67 + 77 + 83 + 30 =
  10. 10.13 + 78 + 49 + 44 =
  11. 11.53 + 78 + 72 + 58 =
  12. 12.64 + 40 + 37 + 14 =
  13. 13.68 + 79 + 71 + 80 =
  14. 14.45 + 40 + 67 + 43 =
  15. 15.36 + 19 + 21 + 67 =
  16. 16.40 + 59 + 47 + 36 =
  17. 17.31 + 14 + 41 + 58 =
  18. 18.27 + 36 + 44 + 83 =
  19. 19.89 + 22 + 55 + 50 =
  20. 20.65 + 56 + 79 + 62 =
  21. 21.63 + 84 + 68 + 35 =
  22. 22.52 + 67 + 25 + 48 =
  23. 23.28 + 24 + 64 + 12 =
  24. 24.66 + 44 + 58 + 41 =
  25. 25.78 + 76 + 86 + 64 =
  26. 26.76 + 57 + 78 + 51 =
  27. 27.59 + 50 + 68 + 56 =
  28. 28.35 + 63 + 59 + 19 =
  29. 29.38 + 81 + 82 + 23 =
  30. 30.78 + 46 + 30 + 21 =
  31. 31.79 + 23 + 71 + 34 =
  32. 32.37 + 76 + 25 + 61 =
  33. 33.13 + 46 + 25 + 17 =
  34. 34.52 + 25 + 50 + 28 =
  35. 35.71 + 41 + 32 + 33 =
  36. 36.84 + 77 + 53 + 54 =
  37. 37.31 + 67 + 26 + 29 =
  38. 38.74 + 54 + 86 + 57 =
  39. 39.32 + 33 + 18 + 72 =
  40. 40.71 + 22 + 66 + 37 =

Answer key

  1. 182
  2. 237
  3. 197
  4. 206
  5. 136
  6. 224
  7. 139
  8. 324
  9. 257
  10. 184
  11. 261
  12. 155
  13. 298
  14. 195
  15. 143
  16. 182
  17. 144
  18. 190
  19. 216
  20. 262
  21. 250
  22. 192
  23. 128
  24. 209
  25. 304
  26. 262
  27. 233
  28. 176
  29. 224
  30. 175
  31. 207
  32. 199
  33. 101
  34. 155
  35. 177
  36. 268
  37. 153
  38. 271
  39. 155
  40. 196

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