Post a response that includes a story of an experience where you used fractions in your life. Use the vocabulary words: numerator, denominator, part, whole and equal in your story.
I made waffles over the weekend and needed to double the recipe to serve all my friends. The hard part was to double the fractions. 1/3 cup of vegetable oil doubled would mean that the numerator is multiplied by 2, while the denominator stays the same. It makes sense that 2/3 is equal to 1/3 doubled. Doubling the milk was more difficult: the original recipe called for 1 3/4 cup of milk. I decided that I could find what 1 3/4 is equal to as an improper fraction. You multiply the number of parts in a whole (4) times the whole number (1) to find out how many parts there are in the whole (4) then add the numerator (3) to get the additional parts and the improper fraction is 7/4. Now this seems easier to double - I get 14/4. I can divide the numerator by the denominator to get back to a mixed number - 3 2/4 which I know needs to be simplified to 3 1/2 cups of milk. The rest of the ingredients were much simpler.
Friday night I ate 1/4 of a pizza. The extra-large pizza had 12 slices - so it was divided into 12 equal (sort of) parts. One slice would be 1/12 of the whole pizza. My fraction, 1/4, is a simplified version that is equal to 3/12. That means that I ate 3 parts of the whole pizza. I simplified 3/12 by dividing the numerator (3) and denominator (12) by their common factor, 3.
I made waffles over the weekend and needed to double the recipe to serve all my friends. The hard part was to double the fractions. 1/3 cup of vegetable oil doubled would mean that the numerator is multiplied by 2, while the denominator stays the same. It makes sense that 2/3 is equal to 1/3 doubled. Doubling the milk was more difficult: the original recipe called for 1 3/4 cup of milk. I decided that I could find what 1 3/4 is equal to as an improper fraction. You multiply the number of parts in a whole (4) times the whole number (1) to find out how many parts there are in the whole (4) then add the numerator (3) to get the additional parts and the improper fraction is 7/4. Now this seems easier to double - I get 14/4. I can divide the numerator by the denominator to get back to a mixed number - 3 2/4 which I know needs to be simplified to 3 1/2 cups of milk. The rest of the ingredients were much simpler.
ReplyDeleteFriday night I ate 1/4 of a pizza. The extra-large pizza had 12 slices - so it was divided into 12 equal (sort of) parts. One slice would be 1/12 of the whole pizza. My fraction, 1/4, is a simplified version that is equal to 3/12. That means that I ate 3 parts of the whole pizza. I simplified 3/12 by dividing the numerator (3) and denominator (12) by their common factor, 3.
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