FALSE
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It is not always necessary. For example 100/5 = 20. No decimal points in sight!
To add fractions with the same denominators, simply add together the numerators, and cancel down if necessary. For example, 5/8 + 1/8 = 6/8. Cancelling this down to an improper fraction in its simplest form, this is equal to 3/4.
significant figures. you'll learn how to use significant figures in high school chemistry.
That is silly question, for 12 inches are necessary to make a foot. It is 7/12 Or seven over twelve. If you add five to that seven then you will get a foot.
Not when you multiply or divide fractions, only when you add or subtract fractions. For example, 1/2 x 5/7 = 5/14. Hope this helps! :)