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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 398 · 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. 1.85 + 16 + 48 + 27 =
  2. 2.68 + 13 + 76 + 41 =
  3. 3.77 + 48 + 50 + 32 =
  4. 4.29 + 30 + 32 + 15 =
  5. 5.77 + 56 + 30 + 67 =
  6. 6.30 + 50 + 77 + 24 =
  7. 7.64 + 34 + 69 + 72 =
  8. 8.31 + 71 + 58 + 26 =
  9. 9.52 + 29 + 32 + 78 =
  10. 10.55 + 38 + 88 + 21 =
  11. 11.29 + 38 + 65 + 81 =
  12. 12.20 + 12 + 39 + 71 =
  13. 13.44 + 30 + 66 + 60 =
  14. 14.79 + 79 + 35 + 77 =
  15. 15.39 + 32 + 84 + 12 =
  16. 16.67 + 38 + 67 + 71 =
  17. 17.76 + 41 + 65 + 59 =
  18. 18.13 + 82 + 18 + 59 =
  19. 19.70 + 66 + 88 + 36 =
  20. 20.77 + 44 + 33 + 45 =
  21. 21.20 + 65 + 59 + 18 =
  22. 22.29 + 34 + 14 + 55 =
  23. 23.33 + 77 + 23 + 59 =
  24. 24.59 + 81 + 42 + 35 =
  25. 25.72 + 86 + 28 + 14 =
  26. 26.81 + 62 + 70 + 53 =
  27. 27.58 + 16 + 39 + 30 =
  28. 28.34 + 40 + 76 + 68 =
  29. 29.24 + 20 + 66 + 64 =
  30. 30.52 + 88 + 88 + 30 =
  31. 31.17 + 29 + 30 + 19 =
  32. 32.31 + 18 + 68 + 32 =
  33. 33.29 + 33 + 24 + 66 =
  34. 34.59 + 44 + 85 + 67 =
  35. 35.33 + 68 + 31 + 31 =
  36. 36.12 + 39 + 15 + 37 =
  37. 37.11 + 58 + 32 + 31 =
  38. 38.77 + 16 + 16 + 11 =
  39. 39.19 + 84 + 18 + 20 =
  40. 40.46 + 27 + 50 + 74 =

Answer key

  1. 176
  2. 198
  3. 207
  4. 106
  5. 230
  6. 181
  7. 239
  8. 186
  9. 191
  10. 202
  11. 213
  12. 142
  13. 200
  14. 270
  15. 167
  16. 243
  17. 241
  18. 172
  19. 260
  20. 199
  21. 162
  22. 132
  23. 192
  24. 217
  25. 200
  26. 266
  27. 143
  28. 218
  29. 174
  30. 258
  31. 95
  32. 149
  33. 152
  34. 255
  35. 163
  36. 103
  37. 132
  38. 120
  39. 141
  40. 197

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