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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 331 · 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. 1.34 + 63 + 21 + 30 =
  2. 2.21 + 73 + 78 + 55 =
  3. 3.28 + 37 + 68 + 26 =
  4. 4.28 + 36 + 61 + 39 =
  5. 5.36 + 56 + 43 + 77 =
  6. 6.40 + 53 + 12 + 14 =
  7. 7.59 + 78 + 35 + 12 =
  8. 8.37 + 13 + 64 + 77 =
  9. 9.68 + 64 + 67 + 50 =
  10. 10.44 + 71 + 31 + 89 =
  11. 11.57 + 28 + 74 + 27 =
  12. 12.13 + 73 + 47 + 54 =
  13. 13.23 + 76 + 57 + 14 =
  14. 14.59 + 26 + 59 + 25 =
  15. 15.69 + 69 + 26 + 23 =
  16. 16.69 + 72 + 27 + 25 =
  17. 17.15 + 48 + 42 + 35 =
  18. 18.55 + 26 + 21 + 85 =
  19. 19.50 + 45 + 83 + 78 =
  20. 20.85 + 43 + 48 + 78 =
  21. 21.83 + 69 + 22 + 44 =
  22. 22.15 + 40 + 25 + 78 =
  23. 23.72 + 43 + 66 + 63 =
  24. 24.70 + 41 + 29 + 42 =
  25. 25.46 + 39 + 41 + 73 =
  26. 26.24 + 11 + 41 + 69 =
  27. 27.70 + 30 + 78 + 81 =
  28. 28.13 + 27 + 47 + 15 =
  29. 29.61 + 45 + 13 + 57 =
  30. 30.82 + 50 + 78 + 33 =
  31. 31.12 + 11 + 82 + 44 =
  32. 32.44 + 89 + 19 + 21 =
  33. 33.87 + 29 + 17 + 77 =
  34. 34.83 + 12 + 44 + 28 =
  35. 35.28 + 29 + 29 + 45 =
  36. 36.46 + 53 + 26 + 52 =
  37. 37.13 + 81 + 85 + 57 =
  38. 38.83 + 44 + 58 + 24 =
  39. 39.53 + 85 + 84 + 19 =
  40. 40.45 + 73 + 83 + 89 =

Answer key

  1. 148
  2. 227
  3. 159
  4. 164
  5. 212
  6. 119
  7. 184
  8. 191
  9. 249
  10. 235
  11. 186
  12. 187
  13. 170
  14. 169
  15. 187
  16. 193
  17. 140
  18. 187
  19. 256
  20. 254
  21. 218
  22. 158
  23. 244
  24. 182
  25. 199
  26. 145
  27. 259
  28. 102
  29. 176
  30. 243
  31. 149
  32. 173
  33. 210
  34. 167
  35. 131
  36. 177
  37. 236
  38. 209
  39. 241
  40. 290

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