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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 55 · 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. 1.18 + 12 + 38 + 63 =
  2. 2.24 + 48 + 25 + 27 =
  3. 3.87 + 39 + 77 + 19 =
  4. 4.33 + 78 + 53 + 87 =
  5. 5.57 + 65 + 68 + 18 =
  6. 6.36 + 32 + 14 + 89 =
  7. 7.33 + 17 + 82 + 88 =
  8. 8.87 + 31 + 43 + 74 =
  9. 9.24 + 14 + 20 + 25 =
  10. 10.83 + 54 + 18 + 48 =
  11. 11.55 + 54 + 17 + 75 =
  12. 12.21 + 27 + 30 + 21 =
  13. 13.46 + 68 + 15 + 56 =
  14. 14.88 + 59 + 72 + 68 =
  15. 15.85 + 53 + 25 + 86 =
  16. 16.76 + 20 + 22 + 29 =
  17. 17.15 + 64 + 62 + 13 =
  18. 18.22 + 28 + 47 + 73 =
  19. 19.22 + 15 + 44 + 65 =
  20. 20.19 + 46 + 16 + 11 =
  21. 21.70 + 82 + 89 + 15 =
  22. 22.77 + 64 + 79 + 72 =
  23. 23.13 + 25 + 84 + 37 =
  24. 24.79 + 21 + 54 + 78 =
  25. 25.83 + 81 + 73 + 78 =
  26. 26.30 + 71 + 35 + 21 =
  27. 27.81 + 17 + 29 + 49 =
  28. 28.41 + 65 + 23 + 20 =
  29. 29.54 + 21 + 70 + 12 =
  30. 30.62 + 77 + 32 + 47 =
  31. 31.67 + 18 + 57 + 14 =
  32. 32.28 + 67 + 48 + 68 =
  33. 33.88 + 81 + 40 + 74 =
  34. 34.59 + 82 + 20 + 52 =
  35. 35.82 + 31 + 47 + 14 =
  36. 36.27 + 11 + 80 + 63 =
  37. 37.77 + 67 + 81 + 22 =
  38. 38.29 + 50 + 79 + 14 =
  39. 39.66 + 24 + 21 + 43 =
  40. 40.76 + 88 + 79 + 62 =

Answer key

  1. 131
  2. 124
  3. 222
  4. 251
  5. 208
  6. 171
  7. 220
  8. 235
  9. 83
  10. 203
  11. 201
  12. 99
  13. 185
  14. 287
  15. 249
  16. 147
  17. 154
  18. 170
  19. 146
  20. 92
  21. 256
  22. 292
  23. 159
  24. 232
  25. 315
  26. 157
  27. 176
  28. 149
  29. 157
  30. 218
  31. 156
  32. 211
  33. 283
  34. 213
  35. 174
  36. 181
  37. 247
  38. 172
  39. 154
  40. 305

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