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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 167 · 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. 1.81 + 15 + 25 + 54 =
  2. 2.29 + 15 + 27 + 45 =
  3. 3.27 + 18 + 19 + 71 =
  4. 4.57 + 12 + 41 + 74 =
  5. 5.22 + 23 + 49 + 51 =
  6. 6.63 + 51 + 23 + 12 =
  7. 7.23 + 57 + 26 + 40 =
  8. 8.80 + 39 + 64 + 33 =
  9. 9.37 + 82 + 13 + 78 =
  10. 10.22 + 63 + 82 + 12 =
  11. 11.70 + 29 + 18 + 77 =
  12. 12.26 + 84 + 13 + 14 =
  13. 13.20 + 58 + 25 + 14 =
  14. 14.54 + 59 + 24 + 26 =
  15. 15.41 + 88 + 87 + 52 =
  16. 16.66 + 25 + 57 + 83 =
  17. 17.35 + 86 + 77 + 27 =
  18. 18.26 + 52 + 26 + 29 =
  19. 19.89 + 62 + 74 + 28 =
  20. 20.87 + 88 + 17 + 12 =
  21. 21.42 + 26 + 17 + 38 =
  22. 22.21 + 75 + 35 + 87 =
  23. 23.29 + 34 + 16 + 62 =
  24. 24.22 + 52 + 71 + 88 =
  25. 25.74 + 26 + 27 + 49 =
  26. 26.36 + 38 + 87 + 74 =
  27. 27.78 + 52 + 76 + 15 =
  28. 28.45 + 63 + 26 + 26 =
  29. 29.38 + 20 + 67 + 51 =
  30. 30.11 + 75 + 50 + 54 =
  31. 31.20 + 51 + 81 + 18 =
  32. 32.30 + 77 + 47 + 38 =
  33. 33.60 + 77 + 12 + 77 =
  34. 34.38 + 65 + 52 + 44 =
  35. 35.11 + 55 + 14 + 24 =
  36. 36.22 + 80 + 33 + 54 =
  37. 37.28 + 56 + 13 + 61 =
  38. 38.60 + 88 + 15 + 78 =
  39. 39.19 + 52 + 41 + 61 =
  40. 40.64 + 48 + 21 + 29 =

Answer key

  1. 175
  2. 116
  3. 135
  4. 184
  5. 145
  6. 149
  7. 146
  8. 216
  9. 210
  10. 179
  11. 194
  12. 137
  13. 117
  14. 163
  15. 268
  16. 231
  17. 225
  18. 133
  19. 253
  20. 204
  21. 123
  22. 218
  23. 141
  24. 233
  25. 176
  26. 235
  27. 221
  28. 160
  29. 176
  30. 190
  31. 170
  32. 192
  33. 226
  34. 199
  35. 104
  36. 189
  37. 158
  38. 241
  39. 173
  40. 162

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