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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 252 · 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. 1.39 + 51 + 79 + 33 =
  2. 2.52 + 21 + 85 + 29 =
  3. 3.80 + 30 + 18 + 12 =
  4. 4.65 + 17 + 79 + 39 =
  5. 5.26 + 12 + 46 + 42 =
  6. 6.35 + 78 + 87 + 33 =
  7. 7.87 + 15 + 11 + 34 =
  8. 8.74 + 71 + 54 + 18 =
  9. 9.54 + 69 + 19 + 69 =
  10. 10.77 + 60 + 38 + 25 =
  11. 11.56 + 16 + 78 + 35 =
  12. 12.80 + 74 + 47 + 76 =
  13. 13.48 + 54 + 87 + 24 =
  14. 14.23 + 58 + 34 + 13 =
  15. 15.17 + 84 + 13 + 20 =
  16. 16.12 + 19 + 15 + 33 =
  17. 17.15 + 34 + 11 + 42 =
  18. 18.72 + 42 + 41 + 78 =
  19. 19.37 + 19 + 69 + 45 =
  20. 20.60 + 12 + 35 + 74 =
  21. 21.61 + 28 + 62 + 40 =
  22. 22.17 + 38 + 40 + 17 =
  23. 23.68 + 72 + 49 + 13 =
  24. 24.27 + 59 + 16 + 52 =
  25. 25.51 + 30 + 40 + 44 =
  26. 26.85 + 17 + 60 + 28 =
  27. 27.28 + 15 + 89 + 45 =
  28. 28.13 + 49 + 63 + 24 =
  29. 29.64 + 17 + 86 + 34 =
  30. 30.23 + 49 + 76 + 42 =
  31. 31.57 + 74 + 24 + 53 =
  32. 32.30 + 86 + 87 + 11 =
  33. 33.52 + 60 + 62 + 89 =
  34. 34.61 + 25 + 36 + 84 =
  35. 35.61 + 25 + 62 + 88 =
  36. 36.82 + 76 + 83 + 77 =
  37. 37.26 + 14 + 70 + 50 =
  38. 38.43 + 32 + 17 + 69 =
  39. 39.36 + 70 + 58 + 67 =
  40. 40.70 + 74 + 70 + 87 =

Answer key

  1. 202
  2. 187
  3. 140
  4. 200
  5. 126
  6. 233
  7. 147
  8. 217
  9. 211
  10. 200
  11. 185
  12. 277
  13. 213
  14. 128
  15. 134
  16. 79
  17. 102
  18. 233
  19. 170
  20. 181
  21. 191
  22. 112
  23. 202
  24. 154
  25. 165
  26. 190
  27. 177
  28. 149
  29. 201
  30. 190
  31. 208
  32. 214
  33. 263
  34. 206
  35. 236
  36. 318
  37. 160
  38. 161
  39. 231
  40. 301

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