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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 270 · 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. 1.66 + 32 + 73 + 88 =
  2. 2.80 + 57 + 43 + 16 =
  3. 3.53 + 15 + 36 + 70 =
  4. 4.39 + 49 + 87 + 16 =
  5. 5.50 + 89 + 63 + 21 =
  6. 6.30 + 14 + 66 + 48 =
  7. 7.20 + 85 + 11 + 16 =
  8. 8.26 + 13 + 30 + 15 =
  9. 9.68 + 33 + 82 + 89 =
  10. 10.63 + 18 + 51 + 62 =
  11. 11.24 + 29 + 28 + 42 =
  12. 12.87 + 23 + 87 + 17 =
  13. 13.62 + 46 + 29 + 13 =
  14. 14.21 + 24 + 20 + 32 =
  15. 15.64 + 62 + 59 + 29 =
  16. 16.34 + 59 + 23 + 14 =
  17. 17.42 + 22 + 25 + 59 =
  18. 18.39 + 88 + 38 + 64 =
  19. 19.26 + 37 + 86 + 19 =
  20. 20.83 + 57 + 48 + 88 =
  21. 21.42 + 71 + 65 + 55 =
  22. 22.40 + 84 + 69 + 24 =
  23. 23.56 + 53 + 41 + 19 =
  24. 24.23 + 48 + 82 + 17 =
  25. 25.27 + 49 + 20 + 18 =
  26. 26.78 + 25 + 74 + 56 =
  27. 27.73 + 32 + 26 + 77 =
  28. 28.77 + 87 + 74 + 27 =
  29. 29.79 + 58 + 85 + 38 =
  30. 30.28 + 39 + 43 + 41 =
  31. 31.36 + 21 + 77 + 88 =
  32. 32.13 + 65 + 54 + 48 =
  33. 33.38 + 48 + 40 + 69 =
  34. 34.25 + 21 + 11 + 26 =
  35. 35.77 + 11 + 60 + 86 =
  36. 36.67 + 13 + 59 + 36 =
  37. 37.79 + 83 + 27 + 52 =
  38. 38.55 + 21 + 64 + 14 =
  39. 39.48 + 19 + 21 + 33 =
  40. 40.40 + 18 + 34 + 44 =

Answer key

  1. 259
  2. 196
  3. 174
  4. 191
  5. 223
  6. 158
  7. 132
  8. 84
  9. 272
  10. 194
  11. 123
  12. 214
  13. 150
  14. 97
  15. 214
  16. 130
  17. 148
  18. 229
  19. 168
  20. 276
  21. 233
  22. 217
  23. 169
  24. 170
  25. 114
  26. 233
  27. 208
  28. 265
  29. 260
  30. 151
  31. 222
  32. 180
  33. 195
  34. 83
  35. 234
  36. 175
  37. 241
  38. 154
  39. 121
  40. 136

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