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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 388 · 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. 1.70 + 30 + 23 + 76 =
  2. 2.62 + 48 + 24 + 18 =
  3. 3.54 + 69 + 66 + 89 =
  4. 4.74 + 67 + 26 + 13 =
  5. 5.41 + 69 + 54 + 86 =
  6. 6.48 + 46 + 89 + 37 =
  7. 7.77 + 17 + 84 + 78 =
  8. 8.53 + 22 + 87 + 59 =
  9. 9.29 + 17 + 21 + 76 =
  10. 10.71 + 41 + 40 + 42 =
  11. 11.16 + 49 + 54 + 45 =
  12. 12.57 + 15 + 35 + 19 =
  13. 13.25 + 42 + 88 + 57 =
  14. 14.64 + 17 + 56 + 13 =
  15. 15.65 + 59 + 63 + 62 =
  16. 16.36 + 70 + 40 + 73 =
  17. 17.14 + 68 + 73 + 31 =
  18. 18.37 + 21 + 35 + 34 =
  19. 19.22 + 58 + 69 + 51 =
  20. 20.21 + 16 + 87 + 34 =
  21. 21.70 + 66 + 44 + 28 =
  22. 22.38 + 72 + 35 + 19 =
  23. 23.54 + 70 + 60 + 54 =
  24. 24.57 + 62 + 70 + 69 =
  25. 25.68 + 63 + 60 + 68 =
  26. 26.84 + 25 + 19 + 37 =
  27. 27.52 + 29 + 46 + 25 =
  28. 28.68 + 32 + 11 + 43 =
  29. 29.22 + 88 + 11 + 52 =
  30. 30.22 + 20 + 83 + 44 =
  31. 31.80 + 30 + 60 + 12 =
  32. 32.80 + 61 + 75 + 73 =
  33. 33.15 + 27 + 65 + 48 =
  34. 34.79 + 60 + 87 + 20 =
  35. 35.33 + 32 + 71 + 53 =
  36. 36.50 + 18 + 21 + 12 =
  37. 37.70 + 70 + 29 + 84 =
  38. 38.52 + 17 + 72 + 29 =
  39. 39.52 + 63 + 79 + 86 =
  40. 40.80 + 12 + 21 + 81 =

Answer key

  1. 199
  2. 152
  3. 278
  4. 180
  5. 250
  6. 220
  7. 256
  8. 221
  9. 143
  10. 194
  11. 164
  12. 126
  13. 212
  14. 150
  15. 249
  16. 219
  17. 186
  18. 127
  19. 200
  20. 158
  21. 208
  22. 164
  23. 238
  24. 258
  25. 259
  26. 165
  27. 152
  28. 154
  29. 173
  30. 169
  31. 182
  32. 289
  33. 155
  34. 246
  35. 189
  36. 101
  37. 253
  38. 170
  39. 280
  40. 194

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