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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 488 · 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. 1.31 + 81 + 81 + 64 =
  2. 2.31 + 50 + 81 + 14 =
  3. 3.21 + 21 + 54 + 82 =
  4. 4.44 + 54 + 34 + 16 =
  5. 5.64 + 62 + 38 + 53 =
  6. 6.66 + 80 + 51 + 82 =
  7. 7.15 + 84 + 74 + 64 =
  8. 8.15 + 72 + 69 + 24 =
  9. 9.54 + 79 + 19 + 33 =
  10. 10.63 + 23 + 72 + 72 =
  11. 11.18 + 49 + 17 + 25 =
  12. 12.73 + 47 + 89 + 81 =
  13. 13.50 + 78 + 29 + 87 =
  14. 14.40 + 86 + 28 + 80 =
  15. 15.83 + 37 + 67 + 51 =
  16. 16.32 + 86 + 14 + 43 =
  17. 17.37 + 57 + 23 + 38 =
  18. 18.13 + 87 + 27 + 28 =
  19. 19.56 + 44 + 30 + 47 =
  20. 20.26 + 38 + 44 + 20 =
  21. 21.50 + 20 + 17 + 41 =
  22. 22.89 + 84 + 75 + 75 =
  23. 23.12 + 52 + 47 + 68 =
  24. 24.49 + 18 + 21 + 20 =
  25. 25.83 + 16 + 36 + 23 =
  26. 26.11 + 14 + 62 + 58 =
  27. 27.76 + 37 + 67 + 22 =
  28. 28.13 + 89 + 37 + 72 =
  29. 29.68 + 61 + 29 + 16 =
  30. 30.79 + 74 + 82 + 83 =
  31. 31.18 + 73 + 38 + 55 =
  32. 32.30 + 11 + 57 + 80 =
  33. 33.88 + 71 + 63 + 49 =
  34. 34.89 + 13 + 57 + 72 =
  35. 35.85 + 89 + 89 + 39 =
  36. 36.78 + 63 + 24 + 24 =
  37. 37.85 + 80 + 60 + 57 =
  38. 38.71 + 13 + 23 + 21 =
  39. 39.62 + 54 + 19 + 79 =
  40. 40.52 + 73 + 25 + 83 =

Answer key

  1. 257
  2. 176
  3. 178
  4. 148
  5. 217
  6. 279
  7. 237
  8. 180
  9. 185
  10. 230
  11. 109
  12. 290
  13. 244
  14. 234
  15. 238
  16. 175
  17. 155
  18. 155
  19. 177
  20. 128
  21. 128
  22. 323
  23. 179
  24. 108
  25. 158
  26. 145
  27. 202
  28. 211
  29. 174
  30. 318
  31. 184
  32. 178
  33. 271
  34. 231
  35. 302
  36. 189
  37. 282
  38. 128
  39. 214
  40. 233

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