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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 602 · 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. 1.41 + 43 + 48 + 36 =
  2. 2.29 + 59 + 17 + 21 =
  3. 3.79 + 27 + 50 + 59 =
  4. 4.89 + 71 + 59 + 66 =
  5. 5.11 + 86 + 45 + 54 =
  6. 6.14 + 33 + 85 + 67 =
  7. 7.43 + 15 + 11 + 73 =
  8. 8.50 + 15 + 78 + 74 =
  9. 9.48 + 55 + 84 + 24 =
  10. 10.83 + 83 + 20 + 89 =
  11. 11.11 + 25 + 17 + 74 =
  12. 12.54 + 63 + 27 + 28 =
  13. 13.21 + 54 + 80 + 67 =
  14. 14.32 + 81 + 20 + 45 =
  15. 15.22 + 88 + 65 + 26 =
  16. 16.78 + 44 + 66 + 56 =
  17. 17.55 + 43 + 20 + 62 =
  18. 18.31 + 44 + 63 + 86 =
  19. 19.26 + 35 + 12 + 28 =
  20. 20.81 + 26 + 42 + 77 =
  21. 21.88 + 70 + 63 + 60 =
  22. 22.57 + 72 + 63 + 84 =
  23. 23.40 + 48 + 29 + 64 =
  24. 24.68 + 83 + 16 + 62 =
  25. 25.20 + 78 + 52 + 68 =
  26. 26.28 + 59 + 79 + 67 =
  27. 27.12 + 60 + 21 + 40 =
  28. 28.78 + 64 + 79 + 32 =
  29. 29.39 + 16 + 16 + 41 =
  30. 30.80 + 63 + 11 + 24 =
  31. 31.22 + 27 + 32 + 16 =
  32. 32.11 + 56 + 58 + 88 =
  33. 33.26 + 82 + 77 + 39 =
  34. 34.45 + 84 + 49 + 12 =
  35. 35.18 + 46 + 85 + 62 =
  36. 36.62 + 47 + 28 + 50 =
  37. 37.58 + 50 + 86 + 64 =
  38. 38.25 + 75 + 85 + 28 =
  39. 39.35 + 39 + 23 + 24 =
  40. 40.64 + 68 + 52 + 23 =

Answer key

  1. 168
  2. 126
  3. 215
  4. 285
  5. 196
  6. 199
  7. 142
  8. 217
  9. 211
  10. 275
  11. 127
  12. 172
  13. 222
  14. 178
  15. 201
  16. 244
  17. 180
  18. 224
  19. 101
  20. 226
  21. 281
  22. 276
  23. 181
  24. 229
  25. 218
  26. 233
  27. 133
  28. 253
  29. 112
  30. 178
  31. 97
  32. 213
  33. 224
  34. 190
  35. 211
  36. 187
  37. 258
  38. 213
  39. 121
  40. 207

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