Dividing Mixed Numbers and Area Problems

This video tutorial by Mr. Math Blog covers the topic of dividing mixed numbers. It begins with an introduction to converting mixed numbers into improper fractions. The tutorial includes practical examples such as calculating the number of sushi rolls Sandra can make with a given amount of rice, determining the number of oatmeal servings from a box, dividing potato salad into containers, and finding the width of a rectangular sandbox. The video emphasizes the use of division and multiplication by reciprocals to solve these problems.

What is the first step in dividing mixed numbers?

• Convert them to decimals

• Convert them to improper fractions

• Add them together

• Subtract them

If Sandra uses 1/8 cup of rice per sushi roll, how many rolls can she make with 2 1/2 cups of rice?

• 15 rolls

• 20 rolls

• 10 rolls

• 25 rolls

How do you rewrite a mixed number as a fraction greater than one?

• Subtract the numerator from the whole number

• Divide the whole number by the numerator

• Add the whole number to the denominator

• Multiply the whole number by the denominator and add the numerator

What is the result of dividing 17 1/2 by 1 2/5?

• 13 1/2

• 13

• 12 1/2

• 12

How many containers are needed if each holds 1 1/4 pounds and you have 10 1/2 pounds of potato salad?

• 10 containers

• 9 containers

• 8 containers

• 11 containers

What operation is used to find the width of a rectangle if the area and length are known?

• Multiplication

• Addition

• Division

• Subtraction

What is the width of a sandbox with an area of 56 2/3 square feet and a length of 8 1/2 feet?

• 7 feet

• 6 2/3 feet

• 6 1/2 feet

• 6 feet

How can you check if your division answer is reasonable?

• By multiplying the result by the divisor

• By adding the result to the divisor

• By dividing the result by the divisor

• By subtracting the result from the divisor

What is the length of a rectangle with an area of 12 3/8 square meters and a width of 2 3/4 meters?

• 4 1/2 meters

• 4 1/4 meters

• 4 3/8 meters

• 4 meters

What is the reciprocal of 1 1/2?

• 3/2

• 1/2

• 2/3

• 2