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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 660 · 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. 1.36 + 76 + 20 + 33 =
  2. 2.62 + 87 + 26 + 84 =
  3. 3.45 + 17 + 79 + 39 =
  4. 4.81 + 18 + 88 + 52 =
  5. 5.69 + 26 + 55 + 31 =
  6. 6.36 + 59 + 71 + 23 =
  7. 7.71 + 17 + 57 + 67 =
  8. 8.80 + 60 + 69 + 48 =
  9. 9.76 + 32 + 70 + 31 =
  10. 10.44 + 13 + 72 + 47 =
  11. 11.83 + 35 + 33 + 76 =
  12. 12.41 + 11 + 55 + 36 =
  13. 13.50 + 14 + 48 + 12 =
  14. 14.55 + 75 + 78 + 20 =
  15. 15.22 + 45 + 16 + 45 =
  16. 16.43 + 65 + 60 + 57 =
  17. 17.80 + 29 + 14 + 55 =
  18. 18.49 + 30 + 33 + 70 =
  19. 19.35 + 38 + 48 + 66 =
  20. 20.77 + 34 + 48 + 81 =
  21. 21.76 + 35 + 53 + 59 =
  22. 22.28 + 17 + 55 + 65 =
  23. 23.20 + 66 + 26 + 65 =
  24. 24.39 + 25 + 54 + 85 =
  25. 25.16 + 65 + 16 + 45 =
  26. 26.81 + 84 + 19 + 33 =
  27. 27.87 + 55 + 71 + 57 =
  28. 28.86 + 80 + 82 + 65 =
  29. 29.81 + 54 + 26 + 35 =
  30. 30.78 + 56 + 29 + 29 =
  31. 31.81 + 13 + 29 + 71 =
  32. 32.41 + 24 + 69 + 40 =
  33. 33.20 + 25 + 34 + 74 =
  34. 34.49 + 35 + 86 + 33 =
  35. 35.56 + 76 + 43 + 30 =
  36. 36.82 + 19 + 66 + 53 =
  37. 37.17 + 86 + 34 + 83 =
  38. 38.69 + 63 + 16 + 46 =
  39. 39.85 + 35 + 60 + 34 =
  40. 40.79 + 18 + 26 + 51 =

Answer key

  1. 165
  2. 259
  3. 180
  4. 239
  5. 181
  6. 189
  7. 212
  8. 257
  9. 209
  10. 176
  11. 227
  12. 143
  13. 124
  14. 228
  15. 128
  16. 225
  17. 178
  18. 182
  19. 187
  20. 240
  21. 223
  22. 165
  23. 177
  24. 203
  25. 142
  26. 217
  27. 270
  28. 313
  29. 196
  30. 192
  31. 194
  32. 174
  33. 153
  34. 203
  35. 205
  36. 220
  37. 220
  38. 194
  39. 214
  40. 174

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