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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 666 · 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. 1.14 + 54 + 13 + 16 =
  2. 2.87 + 78 + 87 + 18 =
  3. 3.41 + 54 + 27 + 89 =
  4. 4.61 + 41 + 35 + 65 =
  5. 5.72 + 54 + 38 + 12 =
  6. 6.16 + 74 + 60 + 32 =
  7. 7.76 + 34 + 63 + 29 =
  8. 8.27 + 24 + 15 + 24 =
  9. 9.22 + 69 + 44 + 78 =
  10. 10.82 + 12 + 19 + 41 =
  11. 11.27 + 77 + 39 + 28 =
  12. 12.26 + 82 + 35 + 11 =
  13. 13.56 + 37 + 83 + 79 =
  14. 14.59 + 17 + 42 + 47 =
  15. 15.81 + 54 + 37 + 50 =
  16. 16.55 + 73 + 52 + 57 =
  17. 17.64 + 58 + 63 + 33 =
  18. 18.51 + 47 + 28 + 48 =
  19. 19.15 + 56 + 31 + 30 =
  20. 20.52 + 39 + 50 + 86 =
  21. 21.50 + 24 + 64 + 73 =
  22. 22.71 + 41 + 30 + 18 =
  23. 23.55 + 65 + 78 + 80 =
  24. 24.67 + 57 + 48 + 27 =
  25. 25.51 + 62 + 13 + 13 =
  26. 26.32 + 48 + 74 + 89 =
  27. 27.21 + 85 + 22 + 39 =
  28. 28.40 + 74 + 42 + 20 =
  29. 29.84 + 40 + 72 + 29 =
  30. 30.16 + 87 + 40 + 26 =
  31. 31.77 + 46 + 51 + 65 =
  32. 32.83 + 81 + 15 + 88 =
  33. 33.82 + 84 + 33 + 64 =
  34. 34.31 + 77 + 50 + 40 =
  35. 35.72 + 32 + 84 + 64 =
  36. 36.48 + 11 + 37 + 15 =
  37. 37.62 + 33 + 82 + 69 =
  38. 38.49 + 22 + 15 + 76 =
  39. 39.55 + 43 + 30 + 70 =
  40. 40.77 + 31 + 29 + 83 =

Answer key

  1. 97
  2. 270
  3. 211
  4. 202
  5. 176
  6. 182
  7. 202
  8. 90
  9. 213
  10. 154
  11. 171
  12. 154
  13. 255
  14. 165
  15. 222
  16. 237
  17. 218
  18. 174
  19. 132
  20. 227
  21. 211
  22. 160
  23. 278
  24. 199
  25. 139
  26. 243
  27. 167
  28. 176
  29. 225
  30. 169
  31. 239
  32. 267
  33. 263
  34. 198
  35. 252
  36. 111
  37. 246
  38. 162
  39. 198
  40. 220

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