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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 342 · 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. 1.68 + 82 + 22 + 57 =
  2. 2.67 + 25 + 43 + 27 =
  3. 3.86 + 32 + 24 + 53 =
  4. 4.53 + 16 + 42 + 11 =
  5. 5.55 + 80 + 51 + 18 =
  6. 6.88 + 60 + 66 + 79 =
  7. 7.26 + 74 + 19 + 57 =
  8. 8.73 + 59 + 41 + 36 =
  9. 9.61 + 78 + 39 + 28 =
  10. 10.26 + 75 + 21 + 23 =
  11. 11.84 + 18 + 36 + 11 =
  12. 12.71 + 50 + 25 + 33 =
  13. 13.34 + 27 + 83 + 22 =
  14. 14.37 + 61 + 13 + 25 =
  15. 15.21 + 31 + 52 + 32 =
  16. 16.82 + 35 + 11 + 11 =
  17. 17.88 + 53 + 84 + 38 =
  18. 18.86 + 31 + 45 + 40 =
  19. 19.19 + 33 + 78 + 45 =
  20. 20.16 + 24 + 78 + 22 =
  21. 21.78 + 31 + 16 + 34 =
  22. 22.41 + 81 + 60 + 73 =
  23. 23.35 + 50 + 62 + 21 =
  24. 24.23 + 21 + 31 + 46 =
  25. 25.32 + 18 + 63 + 44 =
  26. 26.34 + 32 + 59 + 79 =
  27. 27.86 + 44 + 47 + 13 =
  28. 28.64 + 11 + 26 + 84 =
  29. 29.51 + 60 + 76 + 82 =
  30. 30.58 + 48 + 84 + 67 =
  31. 31.73 + 52 + 42 + 26 =
  32. 32.43 + 25 + 87 + 84 =
  33. 33.24 + 23 + 35 + 80 =
  34. 34.79 + 26 + 73 + 54 =
  35. 35.80 + 78 + 70 + 46 =
  36. 36.14 + 56 + 39 + 87 =
  37. 37.18 + 23 + 66 + 19 =
  38. 38.12 + 28 + 42 + 69 =
  39. 39.63 + 35 + 74 + 21 =
  40. 40.59 + 17 + 17 + 20 =

Answer key

  1. 229
  2. 162
  3. 195
  4. 122
  5. 204
  6. 293
  7. 176
  8. 209
  9. 206
  10. 145
  11. 149
  12. 179
  13. 166
  14. 136
  15. 136
  16. 139
  17. 263
  18. 202
  19. 175
  20. 140
  21. 159
  22. 255
  23. 168
  24. 121
  25. 157
  26. 204
  27. 190
  28. 185
  29. 269
  30. 257
  31. 193
  32. 239
  33. 162
  34. 232
  35. 274
  36. 196
  37. 126
  38. 151
  39. 193
  40. 113

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