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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 18 · 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. 1.16 + 43 + 52 + 79 =
  2. 2.52 + 43 + 32 + 18 =
  3. 3.87 + 17 + 60 + 52 =
  4. 4.58 + 59 + 43 + 20 =
  5. 5.21 + 89 + 37 + 62 =
  6. 6.69 + 70 + 32 + 49 =
  7. 7.50 + 15 + 17 + 48 =
  8. 8.82 + 69 + 37 + 85 =
  9. 9.74 + 43 + 52 + 44 =
  10. 10.39 + 13 + 32 + 17 =
  11. 11.72 + 76 + 47 + 24 =
  12. 12.48 + 56 + 42 + 72 =
  13. 13.40 + 69 + 77 + 42 =
  14. 14.15 + 25 + 30 + 51 =
  15. 15.27 + 84 + 36 + 58 =
  16. 16.87 + 37 + 85 + 82 =
  17. 17.78 + 26 + 31 + 27 =
  18. 18.27 + 25 + 55 + 36 =
  19. 19.48 + 26 + 76 + 27 =
  20. 20.66 + 62 + 44 + 70 =
  21. 21.51 + 17 + 11 + 61 =
  22. 22.69 + 68 + 81 + 31 =
  23. 23.21 + 84 + 58 + 85 =
  24. 24.27 + 54 + 16 + 78 =
  25. 25.50 + 64 + 41 + 87 =
  26. 26.56 + 89 + 30 + 83 =
  27. 27.56 + 37 + 78 + 50 =
  28. 28.61 + 70 + 51 + 51 =
  29. 29.84 + 51 + 41 + 35 =
  30. 30.27 + 67 + 82 + 19 =
  31. 31.81 + 24 + 18 + 89 =
  32. 32.45 + 17 + 33 + 25 =
  33. 33.21 + 57 + 85 + 44 =
  34. 34.35 + 13 + 37 + 61 =
  35. 35.14 + 52 + 87 + 22 =
  36. 36.67 + 74 + 64 + 34 =
  37. 37.34 + 56 + 85 + 65 =
  38. 38.63 + 53 + 88 + 47 =
  39. 39.37 + 36 + 52 + 61 =
  40. 40.15 + 41 + 22 + 51 =

Answer key

  1. 190
  2. 145
  3. 216
  4. 180
  5. 209
  6. 220
  7. 130
  8. 273
  9. 213
  10. 101
  11. 219
  12. 218
  13. 228
  14. 121
  15. 205
  16. 291
  17. 162
  18. 143
  19. 177
  20. 242
  21. 140
  22. 249
  23. 248
  24. 175
  25. 242
  26. 258
  27. 221
  28. 233
  29. 211
  30. 195
  31. 212
  32. 120
  33. 207
  34. 146
  35. 175
  36. 239
  37. 240
  38. 251
  39. 186
  40. 129

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