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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 299 · 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. 1.17 + 39 + 74 + 18 =
  2. 2.89 + 34 + 61 + 72 =
  3. 3.74 + 61 + 32 + 18 =
  4. 4.14 + 17 + 69 + 44 =
  5. 5.54 + 58 + 73 + 54 =
  6. 6.54 + 31 + 25 + 17 =
  7. 7.24 + 27 + 47 + 75 =
  8. 8.11 + 30 + 45 + 68 =
  9. 9.81 + 26 + 20 + 31 =
  10. 10.36 + 15 + 68 + 15 =
  11. 11.70 + 29 + 54 + 42 =
  12. 12.69 + 36 + 74 + 35 =
  13. 13.60 + 15 + 72 + 63 =
  14. 14.18 + 47 + 28 + 55 =
  15. 15.46 + 43 + 82 + 12 =
  16. 16.32 + 16 + 42 + 24 =
  17. 17.71 + 45 + 29 + 34 =
  18. 18.19 + 44 + 84 + 46 =
  19. 19.41 + 37 + 18 + 39 =
  20. 20.88 + 69 + 44 + 20 =
  21. 21.30 + 58 + 14 + 67 =
  22. 22.55 + 49 + 27 + 36 =
  23. 23.11 + 89 + 30 + 22 =
  24. 24.51 + 84 + 66 + 82 =
  25. 25.65 + 67 + 70 + 32 =
  26. 26.38 + 65 + 75 + 36 =
  27. 27.89 + 49 + 61 + 73 =
  28. 28.21 + 53 + 13 + 23 =
  29. 29.62 + 25 + 35 + 72 =
  30. 30.75 + 77 + 62 + 52 =
  31. 31.85 + 37 + 62 + 84 =
  32. 32.34 + 36 + 32 + 64 =
  33. 33.73 + 45 + 51 + 19 =
  34. 34.14 + 21 + 76 + 67 =
  35. 35.58 + 59 + 89 + 40 =
  36. 36.33 + 81 + 18 + 38 =
  37. 37.85 + 23 + 35 + 58 =
  38. 38.84 + 13 + 52 + 50 =
  39. 39.52 + 59 + 42 + 49 =
  40. 40.11 + 35 + 68 + 64 =

Answer key

  1. 148
  2. 256
  3. 185
  4. 144
  5. 239
  6. 127
  7. 173
  8. 154
  9. 158
  10. 134
  11. 195
  12. 214
  13. 210
  14. 148
  15. 183
  16. 114
  17. 179
  18. 193
  19. 135
  20. 221
  21. 169
  22. 167
  23. 152
  24. 283
  25. 234
  26. 214
  27. 272
  28. 110
  29. 194
  30. 266
  31. 268
  32. 166
  33. 188
  34. 178
  35. 246
  36. 170
  37. 201
  38. 199
  39. 202
  40. 178

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