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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 352 · 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. 1.83 + 46 + 84 + 44 =
  2. 2.73 + 34 + 85 + 21 =
  3. 3.36 + 33 + 56 + 48 =
  4. 4.55 + 54 + 61 + 76 =
  5. 5.44 + 45 + 59 + 21 =
  6. 6.12 + 66 + 87 + 14 =
  7. 7.56 + 54 + 59 + 52 =
  8. 8.73 + 84 + 77 + 36 =
  9. 9.81 + 83 + 26 + 15 =
  10. 10.38 + 54 + 68 + 82 =
  11. 11.54 + 83 + 85 + 21 =
  12. 12.39 + 16 + 81 + 62 =
  13. 13.18 + 11 + 17 + 52 =
  14. 14.67 + 67 + 33 + 70 =
  15. 15.86 + 72 + 86 + 18 =
  16. 16.56 + 22 + 49 + 81 =
  17. 17.53 + 24 + 45 + 40 =
  18. 18.28 + 23 + 49 + 20 =
  19. 19.67 + 48 + 18 + 74 =
  20. 20.30 + 82 + 34 + 20 =
  21. 21.33 + 58 + 20 + 73 =
  22. 22.29 + 54 + 65 + 84 =
  23. 23.62 + 27 + 65 + 43 =
  24. 24.86 + 88 + 72 + 62 =
  25. 25.33 + 41 + 59 + 47 =
  26. 26.74 + 64 + 40 + 19 =
  27. 27.15 + 35 + 65 + 77 =
  28. 28.64 + 30 + 78 + 76 =
  29. 29.84 + 35 + 34 + 88 =
  30. 30.48 + 45 + 19 + 20 =
  31. 31.42 + 40 + 37 + 83 =
  32. 32.81 + 74 + 67 + 71 =
  33. 33.61 + 73 + 55 + 73 =
  34. 34.17 + 16 + 29 + 46 =
  35. 35.30 + 18 + 60 + 34 =
  36. 36.24 + 80 + 59 + 87 =
  37. 37.64 + 33 + 67 + 60 =
  38. 38.17 + 47 + 77 + 68 =
  39. 39.42 + 26 + 37 + 48 =
  40. 40.42 + 24 + 45 + 79 =

Answer key

  1. 257
  2. 213
  3. 173
  4. 246
  5. 169
  6. 179
  7. 221
  8. 270
  9. 205
  10. 242
  11. 243
  12. 198
  13. 98
  14. 237
  15. 262
  16. 208
  17. 162
  18. 120
  19. 207
  20. 166
  21. 184
  22. 232
  23. 197
  24. 308
  25. 180
  26. 197
  27. 192
  28. 248
  29. 241
  30. 132
  31. 202
  32. 293
  33. 262
  34. 108
  35. 142
  36. 250
  37. 224
  38. 209
  39. 153
  40. 190

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