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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 587 · 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. 1.33 + 88 + 55 + 54 =
  2. 2.42 + 28 + 52 + 39 =
  3. 3.32 + 32 + 28 + 55 =
  4. 4.22 + 33 + 84 + 33 =
  5. 5.58 + 71 + 47 + 84 =
  6. 6.48 + 89 + 60 + 31 =
  7. 7.27 + 49 + 75 + 30 =
  8. 8.13 + 38 + 19 + 84 =
  9. 9.22 + 85 + 13 + 25 =
  10. 10.49 + 39 + 80 + 67 =
  11. 11.24 + 45 + 51 + 26 =
  12. 12.64 + 85 + 13 + 62 =
  13. 13.77 + 66 + 53 + 36 =
  14. 14.70 + 60 + 19 + 68 =
  15. 15.17 + 39 + 24 + 28 =
  16. 16.67 + 33 + 82 + 43 =
  17. 17.77 + 43 + 24 + 49 =
  18. 18.15 + 51 + 77 + 40 =
  19. 19.88 + 44 + 73 + 46 =
  20. 20.51 + 56 + 37 + 69 =
  21. 21.83 + 86 + 82 + 68 =
  22. 22.58 + 51 + 35 + 11 =
  23. 23.69 + 61 + 85 + 47 =
  24. 24.89 + 79 + 31 + 22 =
  25. 25.82 + 45 + 45 + 62 =
  26. 26.65 + 18 + 85 + 24 =
  27. 27.35 + 62 + 72 + 30 =
  28. 28.45 + 12 + 38 + 55 =
  29. 29.22 + 71 + 44 + 50 =
  30. 30.16 + 39 + 37 + 40 =
  31. 31.19 + 56 + 77 + 67 =
  32. 32.21 + 66 + 62 + 65 =
  33. 33.59 + 36 + 17 + 46 =
  34. 34.88 + 75 + 38 + 16 =
  35. 35.46 + 51 + 66 + 80 =
  36. 36.32 + 60 + 46 + 17 =
  37. 37.75 + 45 + 27 + 51 =
  38. 38.68 + 31 + 34 + 14 =
  39. 39.40 + 33 + 74 + 75 =
  40. 40.18 + 37 + 68 + 19 =

Answer key

  1. 230
  2. 161
  3. 147
  4. 172
  5. 260
  6. 228
  7. 181
  8. 154
  9. 145
  10. 235
  11. 146
  12. 224
  13. 232
  14. 217
  15. 108
  16. 225
  17. 193
  18. 183
  19. 251
  20. 213
  21. 319
  22. 155
  23. 262
  24. 221
  25. 234
  26. 192
  27. 199
  28. 150
  29. 187
  30. 132
  31. 219
  32. 214
  33. 158
  34. 217
  35. 243
  36. 155
  37. 198
  38. 147
  39. 222
  40. 142

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