Math notebook weighs 1/2 pound science book weighs 7/8 pound an history book weighs 3/4 pound what are weights in order from lightest to heaviest

Question

Notebook weights 1/2 pound science book weighs 7/8 pound history book weighs 3/4 pound in order lightest to heaviest 

Answer 1

Hi Brandi,

 

When we're comparing fractions, the first step would be to make them all have the same denominator, or bottom number. So we need to look for the least common multiple, or the smallest number that they have in common, that is not zero.

 

1 / 2

7 / 8

3 / 4

 

Looking at the numbers, the smallest bottom number in common would be 8, because 2 * 4 = 8, 8 * 1 = 8, and 4 * 2 = 8. So let's multiply the top and bottom by the same number to get 8 on the bottom.

 

(1 * 4) / (2 * 4) = 4 / 8

(7 * 1) / (8 * 1) = 7 / 8

(3 * 2) / (4 * 2) = 6 / 8

 

We can now tell that the heaviest book is the science book, then the history book, and lastly, the math notebook.

 

Hope this helps!

Answer 2

1/2, 7/8, 3/4

4/8, 7/8, 6/8      convert with common denominator

 

Can you order them now?