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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 726 · 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. 1.63 + 33 + 74 + 72 =
  2. 2.41 + 31 + 11 + 27 =
  3. 3.85 + 87 + 73 + 23 =
  4. 4.73 + 57 + 41 + 84 =
  5. 5.77 + 74 + 25 + 30 =
  6. 6.86 + 21 + 13 + 12 =
  7. 7.23 + 24 + 72 + 35 =
  8. 8.31 + 72 + 42 + 27 =
  9. 9.80 + 71 + 24 + 64 =
  10. 10.87 + 75 + 60 + 32 =
  11. 11.36 + 32 + 40 + 73 =
  12. 12.42 + 62 + 53 + 55 =
  13. 13.63 + 81 + 25 + 80 =
  14. 14.89 + 71 + 23 + 12 =
  15. 15.34 + 63 + 82 + 80 =
  16. 16.24 + 19 + 15 + 31 =
  17. 17.68 + 63 + 40 + 14 =
  18. 18.13 + 34 + 28 + 61 =
  19. 19.63 + 17 + 80 + 64 =
  20. 20.87 + 89 + 23 + 33 =
  21. 21.31 + 30 + 19 + 25 =
  22. 22.80 + 82 + 47 + 49 =
  23. 23.54 + 18 + 13 + 21 =
  24. 24.46 + 50 + 34 + 75 =
  25. 25.49 + 51 + 51 + 74 =
  26. 26.52 + 45 + 14 + 24 =
  27. 27.64 + 31 + 18 + 36 =
  28. 28.85 + 57 + 49 + 27 =
  29. 29.49 + 64 + 49 + 32 =
  30. 30.88 + 17 + 33 + 17 =
  31. 31.40 + 28 + 39 + 14 =
  32. 32.44 + 23 + 79 + 53 =
  33. 33.79 + 35 + 79 + 61 =
  34. 34.23 + 76 + 71 + 65 =
  35. 35.27 + 37 + 80 + 45 =
  36. 36.27 + 85 + 58 + 74 =
  37. 37.16 + 42 + 30 + 37 =
  38. 38.86 + 36 + 29 + 77 =
  39. 39.71 + 69 + 82 + 60 =
  40. 40.18 + 84 + 42 + 47 =

Answer key

  1. 242
  2. 110
  3. 268
  4. 255
  5. 206
  6. 132
  7. 154
  8. 172
  9. 239
  10. 254
  11. 181
  12. 212
  13. 249
  14. 195
  15. 259
  16. 89
  17. 185
  18. 136
  19. 224
  20. 232
  21. 105
  22. 258
  23. 106
  24. 205
  25. 225
  26. 135
  27. 149
  28. 218
  29. 194
  30. 155
  31. 121
  32. 199
  33. 254
  34. 235
  35. 189
  36. 244
  37. 125
  38. 228
  39. 282
  40. 191

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