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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 303 · 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. 1.54 + 55 + 68 + 66 =
  2. 2.43 + 82 + 50 + 75 =
  3. 3.38 + 88 + 71 + 47 =
  4. 4.50 + 36 + 86 + 23 =
  5. 5.15 + 17 + 43 + 25 =
  6. 6.81 + 71 + 31 + 57 =
  7. 7.71 + 21 + 12 + 58 =
  8. 8.54 + 35 + 27 + 38 =
  9. 9.33 + 15 + 29 + 86 =
  10. 10.77 + 80 + 29 + 65 =
  11. 11.58 + 69 + 25 + 23 =
  12. 12.31 + 54 + 17 + 63 =
  13. 13.19 + 89 + 81 + 48 =
  14. 14.43 + 42 + 24 + 15 =
  15. 15.23 + 46 + 36 + 44 =
  16. 16.39 + 48 + 88 + 74 =
  17. 17.13 + 64 + 54 + 86 =
  18. 18.24 + 56 + 58 + 47 =
  19. 19.59 + 44 + 62 + 24 =
  20. 20.74 + 35 + 41 + 57 =
  21. 21.54 + 56 + 69 + 71 =
  22. 22.67 + 58 + 31 + 60 =
  23. 23.89 + 43 + 85 + 89 =
  24. 24.40 + 17 + 77 + 68 =
  25. 25.79 + 35 + 31 + 16 =
  26. 26.35 + 16 + 52 + 79 =
  27. 27.23 + 85 + 63 + 86 =
  28. 28.33 + 16 + 55 + 81 =
  29. 29.66 + 48 + 15 + 25 =
  30. 30.50 + 70 + 61 + 51 =
  31. 31.70 + 55 + 60 + 42 =
  32. 32.16 + 48 + 25 + 74 =
  33. 33.89 + 57 + 12 + 67 =
  34. 34.41 + 81 + 33 + 74 =
  35. 35.57 + 15 + 15 + 30 =
  36. 36.81 + 64 + 54 + 48 =
  37. 37.49 + 81 + 42 + 59 =
  38. 38.75 + 22 + 65 + 20 =
  39. 39.26 + 30 + 14 + 73 =
  40. 40.65 + 83 + 21 + 48 =

Answer key

  1. 243
  2. 250
  3. 244
  4. 195
  5. 100
  6. 240
  7. 162
  8. 154
  9. 163
  10. 251
  11. 175
  12. 165
  13. 237
  14. 124
  15. 149
  16. 249
  17. 217
  18. 185
  19. 189
  20. 207
  21. 250
  22. 216
  23. 306
  24. 202
  25. 161
  26. 182
  27. 257
  28. 185
  29. 154
  30. 232
  31. 227
  32. 163
  33. 225
  34. 229
  35. 117
  36. 247
  37. 231
  38. 182
  39. 143
  40. 217

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