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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 439 · 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. 1.61 + 71 + 71 + 26 =
  2. 2.88 + 48 + 71 + 23 =
  3. 3.34 + 88 + 41 + 35 =
  4. 4.13 + 68 + 26 + 26 =
  5. 5.32 + 55 + 56 + 27 =
  6. 6.39 + 87 + 84 + 65 =
  7. 7.41 + 25 + 14 + 60 =
  8. 8.81 + 59 + 84 + 52 =
  9. 9.39 + 59 + 77 + 12 =
  10. 10.59 + 26 + 25 + 41 =
  11. 11.27 + 72 + 37 + 30 =
  12. 12.89 + 82 + 36 + 53 =
  13. 13.11 + 70 + 89 + 32 =
  14. 14.12 + 37 + 49 + 44 =
  15. 15.62 + 67 + 58 + 20 =
  16. 16.63 + 36 + 11 + 59 =
  17. 17.86 + 76 + 30 + 66 =
  18. 18.80 + 48 + 47 + 54 =
  19. 19.59 + 34 + 13 + 74 =
  20. 20.63 + 27 + 84 + 75 =
  21. 21.88 + 46 + 28 + 57 =
  22. 22.76 + 36 + 75 + 67 =
  23. 23.88 + 14 + 14 + 35 =
  24. 24.18 + 31 + 14 + 79 =
  25. 25.31 + 50 + 29 + 48 =
  26. 26.53 + 48 + 88 + 42 =
  27. 27.80 + 43 + 19 + 32 =
  28. 28.21 + 24 + 60 + 62 =
  29. 29.12 + 35 + 35 + 52 =
  30. 30.40 + 23 + 51 + 16 =
  31. 31.76 + 40 + 69 + 21 =
  32. 32.57 + 82 + 75 + 50 =
  33. 33.89 + 86 + 18 + 50 =
  34. 34.72 + 14 + 76 + 81 =
  35. 35.79 + 68 + 55 + 70 =
  36. 36.14 + 61 + 15 + 13 =
  37. 37.19 + 46 + 75 + 63 =
  38. 38.34 + 30 + 70 + 76 =
  39. 39.60 + 66 + 18 + 26 =
  40. 40.64 + 51 + 68 + 21 =

Answer key

  1. 229
  2. 230
  3. 198
  4. 133
  5. 170
  6. 275
  7. 140
  8. 276
  9. 187
  10. 151
  11. 166
  12. 260
  13. 202
  14. 142
  15. 207
  16. 169
  17. 258
  18. 229
  19. 180
  20. 249
  21. 219
  22. 254
  23. 151
  24. 142
  25. 158
  26. 231
  27. 174
  28. 167
  29. 134
  30. 130
  31. 206
  32. 264
  33. 243
  34. 243
  35. 272
  36. 103
  37. 203
  38. 210
  39. 170
  40. 204

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