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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 378 · 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. 1.21 + 51 + 75 + 87 =
  2. 2.21 + 52 + 73 + 42 =
  3. 3.13 + 47 + 18 + 35 =
  4. 4.28 + 77 + 18 + 11 =
  5. 5.42 + 12 + 37 + 47 =
  6. 6.60 + 77 + 49 + 51 =
  7. 7.74 + 84 + 76 + 39 =
  8. 8.76 + 57 + 15 + 86 =
  9. 9.72 + 49 + 46 + 32 =
  10. 10.61 + 73 + 53 + 12 =
  11. 11.27 + 56 + 40 + 60 =
  12. 12.53 + 24 + 42 + 51 =
  13. 13.16 + 53 + 12 + 88 =
  14. 14.67 + 88 + 11 + 26 =
  15. 15.46 + 14 + 53 + 39 =
  16. 16.74 + 51 + 38 + 70 =
  17. 17.74 + 72 + 26 + 57 =
  18. 18.50 + 43 + 57 + 37 =
  19. 19.32 + 49 + 18 + 38 =
  20. 20.67 + 82 + 31 + 29 =
  21. 21.63 + 50 + 22 + 84 =
  22. 22.19 + 87 + 41 + 43 =
  23. 23.12 + 33 + 63 + 55 =
  24. 24.50 + 71 + 64 + 44 =
  25. 25.19 + 68 + 33 + 78 =
  26. 26.22 + 55 + 30 + 84 =
  27. 27.19 + 85 + 88 + 39 =
  28. 28.77 + 88 + 64 + 24 =
  29. 29.62 + 61 + 61 + 42 =
  30. 30.64 + 51 + 11 + 29 =
  31. 31.83 + 60 + 72 + 34 =
  32. 32.26 + 68 + 18 + 61 =
  33. 33.81 + 85 + 64 + 66 =
  34. 34.17 + 67 + 18 + 37 =
  35. 35.40 + 12 + 18 + 45 =
  36. 36.44 + 43 + 61 + 84 =
  37. 37.72 + 26 + 78 + 13 =
  38. 38.32 + 11 + 66 + 82 =
  39. 39.17 + 11 + 71 + 72 =
  40. 40.79 + 33 + 37 + 33 =

Answer key

  1. 234
  2. 188
  3. 113
  4. 134
  5. 138
  6. 237
  7. 273
  8. 234
  9. 199
  10. 199
  11. 183
  12. 170
  13. 169
  14. 192
  15. 152
  16. 233
  17. 229
  18. 187
  19. 137
  20. 209
  21. 219
  22. 190
  23. 163
  24. 229
  25. 198
  26. 191
  27. 231
  28. 253
  29. 226
  30. 155
  31. 249
  32. 173
  33. 296
  34. 139
  35. 115
  36. 232
  37. 189
  38. 191
  39. 171
  40. 182

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