Mastering Fifth Grade Math: Multiplying Whole Numbers and Fractions

This video lesson focuses on solving word problems involving multiplication of whole numbers and fractions. It begins with an introduction to the concept, followed by two example problems. The first problem involves calculating the amount of low-fat milk sold, given a fraction of total sales. The second problem calculates the amount of water consumed from a glass, using a similar approach. The lesson emphasizes identifying keywords like 'of' to determine when multiplication is needed and demonstrates the process of multiplying fractions and simplifying results.

What is the main focus of this lesson?

• Adding fractions

• Subtracting fractions

• Multiplying whole numbers by fractions

• Dividing whole numbers

In the first word problem, what fraction of the milk sold was low-fat?

• Two-thirds

• One-third

• One-half

• Three-fourths

What operation does the word 'of' usually indicate in word problems?

• Subtraction

• Addition

• Multiplication

• Division

How many gallons of low-fat milk were sold if 60 gallons were sold in total?

• 40 gallons

• 30 gallons

• 20 gallons

• 50 gallons

What is the first step in solving the second word problem about drinking water?

• Subtract the fractions

• Divide the fractions

• Convert the whole number to a fraction

• Add the fractions

How many ounces of water did Jason drink if he drank 2/3 of an 8-ounce glass?

• 6 ounces

• 4 ounces

• 5 and 1/3 ounces

• 7 ounces

What is the result of multiplying 8 by 2/3 in the second problem?

• 12

• 16

• 10

• 5 and 1/3

How do you convert an improper fraction to a mixed number?

• Multiply the numerator by the denominator

• Divide the numerator by the denominator

• Subtract the denominator from the numerator

• Add the numerator and the denominator

What is the remainder when 16 is divided by 3?

• 0

• 1

• 2

• 3

Why does it make sense that Jason drank more than half of the glass?

• Because 2/3 is exactly half

• Because 2/3 is more than half

• Because 2/3 is less than half

• Because 2/3 is equal to half