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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 225 · 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. 1.87 + 42 + 84 + 11 =
  2. 2.64 + 78 + 50 + 66 =
  3. 3.36 + 33 + 77 + 25 =
  4. 4.31 + 46 + 76 + 26 =
  5. 5.28 + 29 + 85 + 46 =
  6. 6.28 + 73 + 25 + 59 =
  7. 7.27 + 15 + 57 + 36 =
  8. 8.48 + 12 + 44 + 19 =
  9. 9.31 + 32 + 50 + 19 =
  10. 10.50 + 32 + 53 + 22 =
  11. 11.76 + 59 + 81 + 50 =
  12. 12.62 + 13 + 89 + 15 =
  13. 13.49 + 50 + 31 + 24 =
  14. 14.41 + 26 + 31 + 57 =
  15. 15.17 + 43 + 53 + 27 =
  16. 16.35 + 70 + 66 + 24 =
  17. 17.35 + 65 + 65 + 56 =
  18. 18.34 + 39 + 22 + 53 =
  19. 19.14 + 50 + 60 + 54 =
  20. 20.85 + 51 + 29 + 68 =
  21. 21.65 + 21 + 31 + 57 =
  22. 22.29 + 67 + 39 + 87 =
  23. 23.89 + 52 + 68 + 79 =
  24. 24.37 + 11 + 79 + 17 =
  25. 25.79 + 83 + 63 + 30 =
  26. 26.39 + 49 + 75 + 66 =
  27. 27.23 + 76 + 64 + 41 =
  28. 28.57 + 59 + 79 + 42 =
  29. 29.43 + 25 + 66 + 21 =
  30. 30.40 + 24 + 26 + 66 =
  31. 31.15 + 45 + 63 + 80 =
  32. 32.59 + 82 + 20 + 45 =
  33. 33.57 + 40 + 31 + 84 =
  34. 34.87 + 64 + 86 + 26 =
  35. 35.41 + 35 + 19 + 29 =
  36. 36.18 + 15 + 66 + 71 =
  37. 37.69 + 19 + 75 + 24 =
  38. 38.39 + 24 + 89 + 41 =
  39. 39.46 + 38 + 34 + 31 =
  40. 40.52 + 21 + 70 + 88 =

Answer key

  1. 224
  2. 258
  3. 171
  4. 179
  5. 188
  6. 185
  7. 135
  8. 123
  9. 132
  10. 157
  11. 266
  12. 179
  13. 154
  14. 155
  15. 140
  16. 195
  17. 221
  18. 148
  19. 178
  20. 233
  21. 174
  22. 222
  23. 288
  24. 144
  25. 255
  26. 229
  27. 204
  28. 237
  29. 155
  30. 156
  31. 203
  32. 206
  33. 212
  34. 263
  35. 124
  36. 170
  37. 187
  38. 193
  39. 149
  40. 231

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