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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 321 · 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. 1.37 + 17 + 27 + 24 =
  2. 2.73 + 28 + 17 + 30 =
  3. 3.59 + 53 + 21 + 19 =
  4. 4.59 + 33 + 28 + 72 =
  5. 5.30 + 81 + 65 + 16 =
  6. 6.30 + 19 + 32 + 54 =
  7. 7.85 + 27 + 79 + 12 =
  8. 8.34 + 12 + 24 + 63 =
  9. 9.24 + 86 + 38 + 81 =
  10. 10.30 + 68 + 50 + 32 =
  11. 11.34 + 12 + 87 + 58 =
  12. 12.21 + 21 + 71 + 48 =
  13. 13.67 + 41 + 22 + 44 =
  14. 14.25 + 65 + 74 + 30 =
  15. 15.41 + 30 + 13 + 87 =
  16. 16.42 + 81 + 17 + 35 =
  17. 17.32 + 61 + 77 + 22 =
  18. 18.34 + 34 + 39 + 21 =
  19. 19.53 + 31 + 56 + 51 =
  20. 20.46 + 37 + 15 + 76 =
  21. 21.17 + 56 + 18 + 33 =
  22. 22.56 + 52 + 60 + 57 =
  23. 23.12 + 83 + 84 + 50 =
  24. 24.40 + 13 + 77 + 60 =
  25. 25.48 + 43 + 35 + 77 =
  26. 26.42 + 77 + 18 + 47 =
  27. 27.77 + 60 + 28 + 24 =
  28. 28.48 + 43 + 76 + 25 =
  29. 29.47 + 30 + 16 + 39 =
  30. 30.69 + 15 + 35 + 49 =
  31. 31.20 + 19 + 30 + 17 =
  32. 32.59 + 67 + 29 + 23 =
  33. 33.26 + 47 + 63 + 40 =
  34. 34.64 + 33 + 47 + 11 =
  35. 35.61 + 22 + 26 + 59 =
  36. 36.52 + 14 + 61 + 45 =
  37. 37.50 + 25 + 60 + 86 =
  38. 38.41 + 51 + 31 + 88 =
  39. 39.23 + 75 + 89 + 65 =
  40. 40.83 + 63 + 37 + 79 =

Answer key

  1. 105
  2. 148
  3. 152
  4. 192
  5. 192
  6. 135
  7. 203
  8. 133
  9. 229
  10. 180
  11. 191
  12. 161
  13. 174
  14. 194
  15. 171
  16. 175
  17. 192
  18. 128
  19. 191
  20. 174
  21. 124
  22. 225
  23. 229
  24. 190
  25. 203
  26. 184
  27. 189
  28. 192
  29. 132
  30. 168
  31. 86
  32. 178
  33. 176
  34. 155
  35. 168
  36. 172
  37. 221
  38. 211
  39. 252
  40. 262

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