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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 394 · 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. 1.35 + 18 + 57 + 44 =
  2. 2.16 + 85 + 76 + 70 =
  3. 3.19 + 23 + 84 + 75 =
  4. 4.59 + 67 + 63 + 77 =
  5. 5.19 + 36 + 53 + 16 =
  6. 6.30 + 13 + 45 + 31 =
  7. 7.48 + 43 + 79 + 17 =
  8. 8.58 + 80 + 82 + 63 =
  9. 9.12 + 32 + 82 + 25 =
  10. 10.14 + 62 + 67 + 81 =
  11. 11.25 + 17 + 71 + 30 =
  12. 12.19 + 25 + 33 + 65 =
  13. 13.33 + 37 + 60 + 49 =
  14. 14.34 + 65 + 85 + 56 =
  15. 15.22 + 54 + 61 + 55 =
  16. 16.31 + 50 + 51 + 39 =
  17. 17.47 + 85 + 17 + 31 =
  18. 18.29 + 79 + 80 + 58 =
  19. 19.74 + 76 + 28 + 11 =
  20. 20.77 + 26 + 37 + 85 =
  21. 21.42 + 68 + 47 + 40 =
  22. 22.26 + 73 + 62 + 41 =
  23. 23.49 + 32 + 48 + 17 =
  24. 24.33 + 14 + 79 + 26 =
  25. 25.30 + 35 + 42 + 32 =
  26. 26.17 + 16 + 27 + 82 =
  27. 27.20 + 30 + 68 + 24 =
  28. 28.24 + 40 + 73 + 32 =
  29. 29.30 + 22 + 25 + 54 =
  30. 30.84 + 75 + 29 + 78 =
  31. 31.29 + 61 + 35 + 46 =
  32. 32.77 + 51 + 70 + 54 =
  33. 33.67 + 75 + 19 + 49 =
  34. 34.59 + 60 + 45 + 55 =
  35. 35.73 + 48 + 32 + 32 =
  36. 36.68 + 26 + 53 + 83 =
  37. 37.70 + 30 + 43 + 53 =
  38. 38.32 + 44 + 22 + 44 =
  39. 39.74 + 87 + 40 + 76 =
  40. 40.76 + 51 + 73 + 12 =

Answer key

  1. 154
  2. 247
  3. 201
  4. 266
  5. 124
  6. 119
  7. 187
  8. 283
  9. 151
  10. 224
  11. 143
  12. 142
  13. 179
  14. 240
  15. 192
  16. 171
  17. 180
  18. 246
  19. 189
  20. 225
  21. 197
  22. 202
  23. 146
  24. 152
  25. 139
  26. 142
  27. 142
  28. 169
  29. 131
  30. 266
  31. 171
  32. 252
  33. 210
  34. 219
  35. 185
  36. 230
  37. 196
  38. 142
  39. 277
  40. 212

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