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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 364 · 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. 1.19 + 38 + 45 + 14 =
  2. 2.25 + 81 + 36 + 67 =
  3. 3.51 + 81 + 76 + 25 =
  4. 4.23 + 43 + 44 + 64 =
  5. 5.88 + 22 + 20 + 27 =
  6. 6.67 + 60 + 47 + 62 =
  7. 7.39 + 87 + 78 + 86 =
  8. 8.37 + 85 + 46 + 85 =
  9. 9.69 + 68 + 44 + 18 =
  10. 10.16 + 51 + 45 + 52 =
  11. 11.27 + 81 + 44 + 25 =
  12. 12.72 + 33 + 15 + 19 =
  13. 13.34 + 19 + 64 + 38 =
  14. 14.68 + 21 + 88 + 54 =
  15. 15.48 + 29 + 20 + 25 =
  16. 16.72 + 63 + 85 + 17 =
  17. 17.24 + 31 + 18 + 38 =
  18. 18.76 + 75 + 53 + 53 =
  19. 19.47 + 53 + 30 + 30 =
  20. 20.41 + 72 + 28 + 29 =
  21. 21.47 + 81 + 89 + 56 =
  22. 22.85 + 12 + 36 + 88 =
  23. 23.11 + 45 + 73 + 42 =
  24. 24.13 + 56 + 39 + 14 =
  25. 25.21 + 43 + 17 + 14 =
  26. 26.16 + 40 + 21 + 62 =
  27. 27.29 + 56 + 79 + 18 =
  28. 28.21 + 25 + 24 + 63 =
  29. 29.79 + 25 + 35 + 27 =
  30. 30.18 + 29 + 72 + 67 =
  31. 31.31 + 20 + 67 + 46 =
  32. 32.46 + 67 + 74 + 36 =
  33. 33.36 + 31 + 56 + 73 =
  34. 34.87 + 88 + 42 + 30 =
  35. 35.31 + 17 + 80 + 44 =
  36. 36.84 + 66 + 60 + 68 =
  37. 37.42 + 88 + 14 + 33 =
  38. 38.77 + 26 + 72 + 64 =
  39. 39.77 + 23 + 76 + 83 =
  40. 40.52 + 70 + 30 + 68 =

Answer key

  1. 116
  2. 209
  3. 233
  4. 174
  5. 157
  6. 236
  7. 290
  8. 253
  9. 199
  10. 164
  11. 177
  12. 139
  13. 155
  14. 231
  15. 122
  16. 237
  17. 111
  18. 257
  19. 160
  20. 170
  21. 273
  22. 221
  23. 171
  24. 122
  25. 95
  26. 139
  27. 182
  28. 133
  29. 166
  30. 186
  31. 164
  32. 223
  33. 196
  34. 247
  35. 172
  36. 278
  37. 177
  38. 239
  39. 259
  40. 220

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