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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 327 · 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 + 62 + 63 + 43 =
  2. 2.26 + 29 + 39 + 40 =
  3. 3.60 + 45 + 46 + 18 =
  4. 4.77 + 51 + 39 + 59 =
  5. 5.20 + 54 + 15 + 80 =
  6. 6.48 + 86 + 59 + 42 =
  7. 7.83 + 49 + 53 + 19 =
  8. 8.24 + 40 + 33 + 52 =
  9. 9.71 + 52 + 85 + 72 =
  10. 10.13 + 52 + 58 + 25 =
  11. 11.14 + 33 + 32 + 13 =
  12. 12.49 + 16 + 17 + 88 =
  13. 13.82 + 26 + 29 + 79 =
  14. 14.72 + 41 + 34 + 89 =
  15. 15.30 + 52 + 57 + 17 =
  16. 16.29 + 27 + 53 + 22 =
  17. 17.27 + 39 + 36 + 58 =
  18. 18.25 + 19 + 71 + 11 =
  19. 19.50 + 42 + 29 + 18 =
  20. 20.23 + 68 + 80 + 70 =
  21. 21.26 + 54 + 83 + 53 =
  22. 22.42 + 48 + 88 + 44 =
  23. 23.15 + 31 + 11 + 85 =
  24. 24.15 + 29 + 46 + 54 =
  25. 25.61 + 27 + 25 + 55 =
  26. 26.74 + 16 + 85 + 71 =
  27. 27.55 + 16 + 13 + 68 =
  28. 28.77 + 19 + 24 + 11 =
  29. 29.36 + 18 + 78 + 79 =
  30. 30.68 + 85 + 44 + 66 =
  31. 31.56 + 64 + 46 + 59 =
  32. 32.69 + 81 + 47 + 78 =
  33. 33.30 + 25 + 29 + 11 =
  34. 34.37 + 12 + 13 + 66 =
  35. 35.51 + 15 + 24 + 11 =
  36. 36.20 + 82 + 63 + 11 =
  37. 37.75 + 31 + 85 + 78 =
  38. 38.29 + 12 + 23 + 79 =
  39. 39.12 + 63 + 27 + 15 =
  40. 40.18 + 69 + 85 + 23 =

Answer key

  1. 250
  2. 134
  3. 169
  4. 226
  5. 169
  6. 235
  7. 204
  8. 149
  9. 280
  10. 148
  11. 92
  12. 170
  13. 216
  14. 236
  15. 156
  16. 131
  17. 160
  18. 126
  19. 139
  20. 241
  21. 216
  22. 222
  23. 142
  24. 144
  25. 168
  26. 246
  27. 152
  28. 131
  29. 211
  30. 263
  31. 225
  32. 275
  33. 95
  34. 128
  35. 101
  36. 176
  37. 269
  38. 143
  39. 117
  40. 195

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