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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 830 · 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. 1.11 + 65 + 77 + 81 =
  2. 2.26 + 27 + 60 + 83 =
  3. 3.14 + 58 + 55 + 18 =
  4. 4.18 + 38 + 48 + 74 =
  5. 5.74 + 69 + 36 + 59 =
  6. 6.12 + 85 + 64 + 38 =
  7. 7.50 + 42 + 14 + 17 =
  8. 8.49 + 72 + 86 + 66 =
  9. 9.88 + 84 + 34 + 14 =
  10. 10.88 + 48 + 48 + 37 =
  11. 11.88 + 48 + 79 + 48 =
  12. 12.80 + 69 + 39 + 32 =
  13. 13.45 + 78 + 38 + 30 =
  14. 14.65 + 23 + 56 + 60 =
  15. 15.29 + 54 + 42 + 27 =
  16. 16.31 + 42 + 62 + 84 =
  17. 17.89 + 83 + 45 + 54 =
  18. 18.48 + 46 + 45 + 21 =
  19. 19.54 + 87 + 59 + 19 =
  20. 20.48 + 62 + 55 + 42 =
  21. 21.64 + 52 + 73 + 23 =
  22. 22.79 + 20 + 26 + 75 =
  23. 23.42 + 41 + 22 + 56 =
  24. 24.31 + 53 + 38 + 34 =
  25. 25.14 + 41 + 34 + 68 =
  26. 26.27 + 83 + 51 + 39 =
  27. 27.23 + 25 + 37 + 13 =
  28. 28.20 + 89 + 54 + 46 =
  29. 29.74 + 78 + 46 + 62 =
  30. 30.79 + 62 + 16 + 29 =
  31. 31.57 + 17 + 43 + 50 =
  32. 32.17 + 44 + 30 + 77 =
  33. 33.62 + 65 + 32 + 45 =
  34. 34.89 + 29 + 75 + 53 =
  35. 35.29 + 19 + 77 + 63 =
  36. 36.13 + 79 + 48 + 62 =
  37. 37.31 + 51 + 13 + 41 =
  38. 38.87 + 70 + 63 + 28 =
  39. 39.36 + 47 + 87 + 33 =
  40. 40.67 + 49 + 16 + 34 =

Answer key

  1. 234
  2. 196
  3. 145
  4. 178
  5. 238
  6. 199
  7. 123
  8. 273
  9. 220
  10. 221
  11. 263
  12. 220
  13. 191
  14. 204
  15. 152
  16. 219
  17. 271
  18. 160
  19. 219
  20. 207
  21. 212
  22. 200
  23. 161
  24. 156
  25. 157
  26. 200
  27. 98
  28. 209
  29. 260
  30. 186
  31. 167
  32. 168
  33. 204
  34. 246
  35. 188
  36. 202
  37. 136
  38. 248
  39. 203
  40. 166

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