Question

Jeff uses 3 fifth- size strips to model 3/5. he wants to use tenth size strips to models an equivalent fraction. how many tenth size strips will he need ?

Answer 1

he will need 6 tenth size strips

Answer 2

how do you go from a denominator of 5 --> 10

well 2 *5 = 10

so if we want to change 3/5 to have a denominator of 10, we can multiple the entire fraction by 2/2 (or 1)