A box of cereal contains 340 grams of carbon hydrates if there are 12 servings about how many grams are there in one serving show how you estimated explain why your answer is reasonable

30 grams

Step-by-step explanation:

To estimate using mental math, make 340 grams become 360 grams (because 12 fits into 36 perfectly). Now if you divide 360 by 12 you get a whole number: 30. Therefore you can estimate that there are about 30 grams of carbs in a serving.

The answer is reasonable because you changed 340 to a number that can easily work with 12 and is the closest (closer than 240), so you would get a not far-off answer.