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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 809 · 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. 1.17 + 46 + 35 + 89 =
  2. 2.18 + 83 + 64 + 45 =
  3. 3.50 + 27 + 74 + 48 =
  4. 4.54 + 79 + 71 + 52 =
  5. 5.49 + 60 + 11 + 54 =
  6. 6.17 + 17 + 75 + 35 =
  7. 7.66 + 52 + 60 + 36 =
  8. 8.89 + 52 + 44 + 73 =
  9. 9.59 + 72 + 73 + 34 =
  10. 10.88 + 17 + 79 + 52 =
  11. 11.76 + 43 + 89 + 89 =
  12. 12.11 + 40 + 22 + 86 =
  13. 13.50 + 82 + 28 + 17 =
  14. 14.20 + 40 + 52 + 61 =
  15. 15.83 + 24 + 11 + 13 =
  16. 16.76 + 72 + 16 + 16 =
  17. 17.25 + 49 + 12 + 82 =
  18. 18.43 + 21 + 32 + 38 =
  19. 19.30 + 89 + 47 + 84 =
  20. 20.37 + 39 + 14 + 38 =
  21. 21.77 + 40 + 47 + 55 =
  22. 22.47 + 49 + 70 + 18 =
  23. 23.36 + 22 + 80 + 41 =
  24. 24.66 + 81 + 28 + 60 =
  25. 25.48 + 28 + 26 + 21 =
  26. 26.80 + 88 + 56 + 81 =
  27. 27.51 + 72 + 56 + 23 =
  28. 28.61 + 68 + 80 + 86 =
  29. 29.68 + 17 + 14 + 19 =
  30. 30.23 + 72 + 25 + 86 =
  31. 31.21 + 36 + 16 + 60 =
  32. 32.15 + 66 + 68 + 11 =
  33. 33.47 + 30 + 54 + 52 =
  34. 34.39 + 22 + 77 + 84 =
  35. 35.33 + 15 + 51 + 24 =
  36. 36.34 + 17 + 38 + 63 =
  37. 37.33 + 28 + 88 + 47 =
  38. 38.75 + 63 + 71 + 75 =
  39. 39.26 + 33 + 88 + 67 =
  40. 40.15 + 25 + 28 + 67 =

Answer key

  1. 187
  2. 210
  3. 199
  4. 256
  5. 174
  6. 144
  7. 214
  8. 258
  9. 238
  10. 236
  11. 297
  12. 159
  13. 177
  14. 173
  15. 131
  16. 180
  17. 168
  18. 134
  19. 250
  20. 128
  21. 219
  22. 184
  23. 179
  24. 235
  25. 123
  26. 305
  27. 202
  28. 295
  29. 118
  30. 206
  31. 133
  32. 160
  33. 183
  34. 222
  35. 123
  36. 152
  37. 196
  38. 284
  39. 214
  40. 135

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