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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 778 · 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. 1.41 + 76 + 55 + 70 =
  2. 2.80 + 60 + 78 + 68 =
  3. 3.84 + 39 + 71 + 13 =
  4. 4.77 + 31 + 22 + 12 =
  5. 5.16 + 63 + 73 + 63 =
  6. 6.63 + 79 + 48 + 11 =
  7. 7.13 + 83 + 87 + 63 =
  8. 8.29 + 82 + 50 + 20 =
  9. 9.18 + 71 + 21 + 57 =
  10. 10.24 + 81 + 60 + 22 =
  11. 11.56 + 35 + 60 + 48 =
  12. 12.89 + 56 + 60 + 41 =
  13. 13.76 + 30 + 28 + 25 =
  14. 14.66 + 18 + 37 + 68 =
  15. 15.16 + 30 + 37 + 48 =
  16. 16.84 + 60 + 31 + 67 =
  17. 17.34 + 88 + 46 + 81 =
  18. 18.66 + 31 + 32 + 56 =
  19. 19.19 + 56 + 60 + 12 =
  20. 20.37 + 84 + 67 + 26 =
  21. 21.88 + 26 + 67 + 87 =
  22. 22.70 + 60 + 25 + 36 =
  23. 23.40 + 27 + 72 + 73 =
  24. 24.34 + 22 + 47 + 23 =
  25. 25.82 + 22 + 77 + 26 =
  26. 26.65 + 55 + 82 + 31 =
  27. 27.67 + 51 + 14 + 23 =
  28. 28.19 + 11 + 70 + 36 =
  29. 29.84 + 21 + 55 + 62 =
  30. 30.79 + 38 + 19 + 24 =
  31. 31.31 + 36 + 70 + 37 =
  32. 32.28 + 29 + 16 + 27 =
  33. 33.15 + 63 + 71 + 81 =
  34. 34.79 + 67 + 89 + 65 =
  35. 35.50 + 71 + 59 + 23 =
  36. 36.71 + 60 + 64 + 29 =
  37. 37.43 + 54 + 37 + 84 =
  38. 38.42 + 84 + 28 + 66 =
  39. 39.28 + 66 + 64 + 12 =
  40. 40.70 + 65 + 71 + 71 =

Answer key

  1. 242
  2. 286
  3. 207
  4. 142
  5. 215
  6. 201
  7. 246
  8. 181
  9. 167
  10. 187
  11. 199
  12. 246
  13. 159
  14. 189
  15. 131
  16. 242
  17. 249
  18. 185
  19. 147
  20. 214
  21. 268
  22. 191
  23. 212
  24. 126
  25. 207
  26. 233
  27. 155
  28. 136
  29. 222
  30. 160
  31. 174
  32. 100
  33. 230
  34. 300
  35. 203
  36. 224
  37. 218
  38. 220
  39. 170
  40. 277

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