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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 772 · 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. 1.51 + 45 + 13 + 14 =
  2. 2.64 + 48 + 60 + 32 =
  3. 3.21 + 76 + 49 + 66 =
  4. 4.48 + 58 + 70 + 29 =
  5. 5.75 + 40 + 11 + 55 =
  6. 6.53 + 11 + 34 + 44 =
  7. 7.70 + 17 + 83 + 64 =
  8. 8.13 + 58 + 37 + 47 =
  9. 9.66 + 15 + 34 + 31 =
  10. 10.71 + 30 + 52 + 69 =
  11. 11.80 + 88 + 26 + 51 =
  12. 12.23 + 80 + 29 + 15 =
  13. 13.60 + 46 + 22 + 21 =
  14. 14.61 + 82 + 18 + 66 =
  15. 15.50 + 23 + 36 + 34 =
  16. 16.17 + 12 + 70 + 52 =
  17. 17.81 + 50 + 52 + 29 =
  18. 18.26 + 33 + 30 + 38 =
  19. 19.86 + 26 + 61 + 75 =
  20. 20.31 + 78 + 84 + 64 =
  21. 21.70 + 21 + 20 + 74 =
  22. 22.23 + 68 + 45 + 23 =
  23. 23.53 + 54 + 69 + 87 =
  24. 24.44 + 70 + 53 + 49 =
  25. 25.60 + 42 + 82 + 43 =
  26. 26.63 + 44 + 27 + 51 =
  27. 27.67 + 71 + 32 + 55 =
  28. 28.29 + 33 + 86 + 39 =
  29. 29.67 + 24 + 15 + 88 =
  30. 30.75 + 44 + 61 + 21 =
  31. 31.48 + 80 + 23 + 12 =
  32. 32.88 + 71 + 12 + 26 =
  33. 33.17 + 16 + 61 + 46 =
  34. 34.80 + 50 + 84 + 88 =
  35. 35.84 + 41 + 44 + 45 =
  36. 36.19 + 42 + 14 + 77 =
  37. 37.86 + 60 + 42 + 15 =
  38. 38.31 + 45 + 45 + 26 =
  39. 39.64 + 17 + 89 + 37 =
  40. 40.45 + 16 + 72 + 66 =

Answer key

  1. 123
  2. 204
  3. 212
  4. 205
  5. 181
  6. 142
  7. 234
  8. 155
  9. 146
  10. 222
  11. 245
  12. 147
  13. 149
  14. 227
  15. 143
  16. 151
  17. 212
  18. 127
  19. 248
  20. 257
  21. 185
  22. 159
  23. 263
  24. 216
  25. 227
  26. 185
  27. 225
  28. 187
  29. 194
  30. 201
  31. 163
  32. 197
  33. 140
  34. 302
  35. 214
  36. 152
  37. 203
  38. 147
  39. 207
  40. 199

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