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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 219 · 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. 1.15 + 59 + 39 + 64 =
  2. 2.30 + 30 + 78 + 69 =
  3. 3.48 + 84 + 43 + 51 =
  4. 4.43 + 73 + 85 + 61 =
  5. 5.74 + 30 + 45 + 32 =
  6. 6.24 + 24 + 78 + 57 =
  7. 7.18 + 22 + 14 + 28 =
  8. 8.63 + 89 + 36 + 69 =
  9. 9.54 + 36 + 50 + 89 =
  10. 10.24 + 11 + 26 + 40 =
  11. 11.28 + 64 + 85 + 14 =
  12. 12.65 + 16 + 47 + 52 =
  13. 13.27 + 31 + 12 + 38 =
  14. 14.89 + 12 + 47 + 11 =
  15. 15.66 + 78 + 42 + 57 =
  16. 16.66 + 35 + 35 + 66 =
  17. 17.64 + 65 + 40 + 74 =
  18. 18.67 + 26 + 43 + 49 =
  19. 19.83 + 50 + 62 + 29 =
  20. 20.77 + 66 + 17 + 17 =
  21. 21.70 + 62 + 27 + 75 =
  22. 22.21 + 48 + 86 + 13 =
  23. 23.14 + 24 + 42 + 21 =
  24. 24.78 + 50 + 83 + 41 =
  25. 25.79 + 48 + 27 + 28 =
  26. 26.25 + 71 + 17 + 20 =
  27. 27.30 + 36 + 11 + 84 =
  28. 28.75 + 87 + 23 + 29 =
  29. 29.83 + 46 + 57 + 25 =
  30. 30.33 + 41 + 51 + 53 =
  31. 31.41 + 28 + 53 + 28 =
  32. 32.29 + 76 + 24 + 54 =
  33. 33.21 + 26 + 41 + 18 =
  34. 34.83 + 71 + 22 + 64 =
  35. 35.73 + 76 + 11 + 59 =
  36. 36.13 + 73 + 22 + 76 =
  37. 37.82 + 89 + 49 + 13 =
  38. 38.39 + 37 + 32 + 38 =
  39. 39.70 + 40 + 33 + 26 =
  40. 40.44 + 27 + 35 + 75 =

Answer key

  1. 177
  2. 207
  3. 226
  4. 262
  5. 181
  6. 183
  7. 82
  8. 257
  9. 229
  10. 101
  11. 191
  12. 180
  13. 108
  14. 159
  15. 243
  16. 202
  17. 243
  18. 185
  19. 224
  20. 177
  21. 234
  22. 168
  23. 101
  24. 252
  25. 182
  26. 133
  27. 161
  28. 214
  29. 211
  30. 178
  31. 150
  32. 183
  33. 106
  34. 240
  35. 219
  36. 184
  37. 233
  38. 146
  39. 169
  40. 181

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