Exercise 72 Page 25

Let's find how much flour Tamara needs for the two type of breads separately.

First Type of Bread

If one loaf needs 2 12 cups of flour and Tamara wants to make 2 loafs, then she needs twice as much flour. 2* 2 12=5Tamara needs 5 cups of flour to make two loafs of bread of the first type.

Second Type of Bread

For the second type, if one loaf needs 1 34 cups of flour and Tamara wants to make 3 loafs, then she needs three times as much flour. To multiply the mixed number by 3, we first rewrite it. 3* 1 34=3(1+3/4) Let's evaluate the expression.

Tamara needs 5 14 cups of flour to make three loafs of bread of the second type.

Answering the Question

We now know that Tamara needs 5 cups of flour for the two loaves of bread of the first type and 5 14 cups of flour for the three loaves of bread of the second type. Let's add these two numbers. 5+ 5 14= 10 14 Tamara needs 10 14 cups of flour to make all of the bread.