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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 232 · 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. 1.71 + 83 + 79 + 23 =
  2. 2.44 + 15 + 83 + 23 =
  3. 3.55 + 19 + 20 + 52 =
  4. 4.84 + 71 + 12 + 22 =
  5. 5.20 + 78 + 63 + 30 =
  6. 6.80 + 64 + 33 + 27 =
  7. 7.71 + 65 + 34 + 68 =
  8. 8.47 + 58 + 50 + 69 =
  9. 9.47 + 89 + 33 + 52 =
  10. 10.78 + 46 + 78 + 26 =
  11. 11.45 + 88 + 15 + 12 =
  12. 12.32 + 23 + 85 + 15 =
  13. 13.49 + 88 + 52 + 62 =
  14. 14.86 + 18 + 18 + 49 =
  15. 15.76 + 62 + 49 + 25 =
  16. 16.69 + 51 + 89 + 48 =
  17. 17.51 + 51 + 50 + 65 =
  18. 18.22 + 13 + 45 + 51 =
  19. 19.26 + 13 + 48 + 39 =
  20. 20.85 + 46 + 44 + 38 =
  21. 21.47 + 16 + 44 + 51 =
  22. 22.15 + 44 + 46 + 49 =
  23. 23.33 + 18 + 41 + 24 =
  24. 24.86 + 86 + 70 + 42 =
  25. 25.16 + 80 + 62 + 55 =
  26. 26.25 + 73 + 40 + 88 =
  27. 27.20 + 79 + 77 + 16 =
  28. 28.27 + 45 + 89 + 27 =
  29. 29.21 + 18 + 15 + 82 =
  30. 30.85 + 17 + 83 + 53 =
  31. 31.20 + 40 + 53 + 31 =
  32. 32.39 + 23 + 76 + 30 =
  33. 33.36 + 35 + 73 + 54 =
  34. 34.35 + 42 + 61 + 41 =
  35. 35.80 + 14 + 56 + 48 =
  36. 36.29 + 67 + 46 + 83 =
  37. 37.48 + 24 + 27 + 32 =
  38. 38.58 + 37 + 51 + 22 =
  39. 39.45 + 65 + 54 + 57 =
  40. 40.71 + 87 + 50 + 11 =

Answer key

  1. 256
  2. 165
  3. 146
  4. 189
  5. 191
  6. 204
  7. 238
  8. 224
  9. 221
  10. 228
  11. 160
  12. 155
  13. 251
  14. 171
  15. 212
  16. 257
  17. 217
  18. 131
  19. 126
  20. 213
  21. 158
  22. 154
  23. 116
  24. 284
  25. 213
  26. 226
  27. 192
  28. 188
  29. 136
  30. 238
  31. 144
  32. 168
  33. 198
  34. 179
  35. 198
  36. 225
  37. 131
  38. 168
  39. 221
  40. 219

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