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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 426 · 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. 1.40 + 42 + 86 + 77 =
  2. 2.77 + 28 + 86 + 33 =
  3. 3.67 + 11 + 55 + 34 =
  4. 4.20 + 86 + 44 + 27 =
  5. 5.83 + 21 + 36 + 35 =
  6. 6.38 + 59 + 79 + 79 =
  7. 7.20 + 39 + 40 + 73 =
  8. 8.35 + 85 + 83 + 31 =
  9. 9.27 + 14 + 78 + 18 =
  10. 10.18 + 25 + 81 + 80 =
  11. 11.27 + 85 + 72 + 71 =
  12. 12.44 + 88 + 44 + 34 =
  13. 13.14 + 57 + 60 + 14 =
  14. 14.49 + 64 + 82 + 42 =
  15. 15.24 + 64 + 19 + 14 =
  16. 16.48 + 11 + 70 + 56 =
  17. 17.11 + 82 + 67 + 27 =
  18. 18.53 + 34 + 88 + 74 =
  19. 19.51 + 52 + 48 + 88 =
  20. 20.61 + 21 + 20 + 19 =
  21. 21.79 + 13 + 41 + 65 =
  22. 22.52 + 74 + 74 + 76 =
  23. 23.26 + 35 + 61 + 17 =
  24. 24.25 + 38 + 71 + 22 =
  25. 25.33 + 23 + 32 + 18 =
  26. 26.44 + 76 + 28 + 21 =
  27. 27.75 + 29 + 14 + 29 =
  28. 28.58 + 32 + 18 + 42 =
  29. 29.49 + 60 + 47 + 72 =
  30. 30.26 + 43 + 78 + 36 =
  31. 31.20 + 61 + 66 + 81 =
  32. 32.85 + 18 + 27 + 85 =
  33. 33.21 + 79 + 22 + 76 =
  34. 34.35 + 69 + 48 + 13 =
  35. 35.75 + 15 + 25 + 51 =
  36. 36.87 + 11 + 68 + 74 =
  37. 37.53 + 39 + 75 + 18 =
  38. 38.19 + 33 + 17 + 18 =
  39. 39.55 + 11 + 36 + 32 =
  40. 40.42 + 37 + 40 + 22 =

Answer key

  1. 245
  2. 224
  3. 167
  4. 177
  5. 175
  6. 255
  7. 172
  8. 234
  9. 137
  10. 204
  11. 255
  12. 210
  13. 145
  14. 237
  15. 121
  16. 185
  17. 187
  18. 249
  19. 239
  20. 121
  21. 198
  22. 276
  23. 139
  24. 156
  25. 106
  26. 169
  27. 147
  28. 150
  29. 228
  30. 183
  31. 228
  32. 215
  33. 198
  34. 165
  35. 166
  36. 240
  37. 185
  38. 87
  39. 134
  40. 141

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