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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 618 · 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. 1.82 + 60 + 14 + 66 =
  2. 2.48 + 60 + 57 + 14 =
  3. 3.28 + 16 + 60 + 77 =
  4. 4.43 + 41 + 50 + 24 =
  5. 5.56 + 60 + 53 + 22 =
  6. 6.14 + 32 + 79 + 74 =
  7. 7.48 + 53 + 70 + 15 =
  8. 8.80 + 76 + 42 + 25 =
  9. 9.67 + 41 + 16 + 41 =
  10. 10.71 + 53 + 50 + 54 =
  11. 11.18 + 54 + 52 + 20 =
  12. 12.31 + 42 + 67 + 55 =
  13. 13.35 + 83 + 15 + 48 =
  14. 14.61 + 13 + 42 + 77 =
  15. 15.75 + 25 + 41 + 12 =
  16. 16.71 + 11 + 39 + 57 =
  17. 17.73 + 86 + 77 + 33 =
  18. 18.14 + 87 + 69 + 50 =
  19. 19.77 + 29 + 79 + 63 =
  20. 20.16 + 26 + 25 + 23 =
  21. 21.77 + 22 + 35 + 76 =
  22. 22.70 + 39 + 80 + 89 =
  23. 23.63 + 63 + 38 + 34 =
  24. 24.34 + 78 + 22 + 46 =
  25. 25.17 + 39 + 37 + 35 =
  26. 26.78 + 58 + 49 + 27 =
  27. 27.24 + 40 + 27 + 69 =
  28. 28.30 + 56 + 67 + 56 =
  29. 29.88 + 52 + 62 + 25 =
  30. 30.23 + 80 + 17 + 79 =
  31. 31.12 + 64 + 37 + 83 =
  32. 32.14 + 22 + 65 + 30 =
  33. 33.70 + 29 + 14 + 17 =
  34. 34.36 + 60 + 24 + 45 =
  35. 35.45 + 20 + 85 + 48 =
  36. 36.74 + 82 + 46 + 82 =
  37. 37.65 + 23 + 30 + 73 =
  38. 38.19 + 57 + 31 + 79 =
  39. 39.16 + 82 + 57 + 58 =
  40. 40.87 + 28 + 31 + 44 =

Answer key

  1. 222
  2. 179
  3. 181
  4. 158
  5. 191
  6. 199
  7. 186
  8. 223
  9. 165
  10. 228
  11. 144
  12. 195
  13. 181
  14. 193
  15. 153
  16. 178
  17. 269
  18. 220
  19. 248
  20. 90
  21. 210
  22. 278
  23. 198
  24. 180
  25. 128
  26. 212
  27. 160
  28. 209
  29. 227
  30. 199
  31. 196
  32. 131
  33. 130
  34. 165
  35. 198
  36. 284
  37. 191
  38. 186
  39. 213
  40. 190

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