Multiplying and Dividing Fractions and Whole Numbers

There is 1/3 of a pan of brownies left. Four children are going to share it equally. What fraction of the whole pan of brownies will each child get?

• 7

• 12

Damian has a piece of string that is 3 feet long. He cuts it into pieces that are ¼ foot long. How many pieces does of string does he cut?

• 12 pieces

• 16 pieces

Javier has 2 pies that he wants to cut into sixths. How many 1/ 6 pieces will Javier have?

Janelle divides 3 pieces of paper into fifths. How many fifths does she have? What expression represents the situation above?

Answer explanation

How do you multiply fractions and whole numbers?

• Keep, Change, and Flip; simplify if needed

• Change the whole number to a fraction by dividing by 1, multiply the numerators and denominators; simplify if needed

• Change the divisor to a whole number by moving the decimal to the right. Make sure you move the dividend the same amount of places

• Multiply numerators & Multiply denominators; simplify if needed

How do you divide fractions with whole numbers?

• Change the whole number to a fraction by having the denominator be 1. Keep the 1st fraction, change the sign to multiply, flip the 2nd fraction; simplify if needed

• Change the whole number to a fraction by dividing by 1, multiply the numerators and denominators

• Keep, Change, and Flip; simplify if needed

• Multiply numerators & Multiply denominators; simplify if needed

How do you multiply fractions?

• Keep, Change, and Flip; simplify if needed

• Count how many numbers are behind each decimal and add the decimal places

• Change the divisor to a whole number by moving the decimal to the right. Make sure you move the dividend the same amount of places

• Multiply straight across and simplify if needed

How do you multiply fractions with mixed numbers?

• Keep, Change, and Flip; simplify if needed

• Change the whole number to a fraction by dividing by 1, multiply the numerators and denominators

• Multiply numerators & Multiply denominators; simplify if needed

• Change each mixed number to an improper fraction, multiply the numerators and then multiply the denominators; simplify if needed

How do you divide fractions?

• Keep, Change, Flip; simplify if needed

• Change the whole number to a fraction by dividing by 1, multiply the numerators and denominators; simplify if needed

• Change the divisor to a whole number by moving the decimal to the right. Make sure you move the dividend the same amount of places

• Multiply numerators & Multiply denominators; simplify if needed

How do you divide fractions with mixed numbers?

• Change the mixed number to an improper fraction, rewrite the new problem; Keep, Change, Flip; simplify if needed

• Change the whole number to a fraction by having the denominator be 1. Keep the 1st fraction, change the sign to multiply, flip the 2nd fraction; simplify if needed

• Change the whole number to a fraction by dividing by 1, multiply the numerators and denominators

• Keep, Change, and Flip; simplify if needed