Solving Subtracting Fractions Word Problems

In this video, Mr. J explains how to solve word problems involving the subtraction of fractions. The video covers two examples: one involving a science teacher using salt water for an experiment and another comparing jogging times of two individuals. Mr. J demonstrates how to find a common denominator to subtract fractions and solve these problems. The video concludes with a summary of the examples and encourages viewers to practice these skills.

What mathematical operation will be used to solve the word problems in this video?

• Division

• Multiplication

• Subtraction

• Addition

Tags

CCSS.3.OA.A.3

In the first word problem, how much salt water did the science teacher start with?

• One-third of a liter

• Three-fourths of a liter

• Two-thirds of a liter

• One-fifth of a liter

Tags

CCSS.7.NS.A.3

What is the common denominator used to solve the first word problem?

• 10

• 12

• 15

• 20

After converting to a common denominator, what is the equivalent fraction of two-thirds?

• 10/15

• 9/12

• 7/14

• 8/10

How much salt water does the teacher have left after the experiment?

• 3/15 of a liter

• 9/15 of a liter

• 5/12 of a liter

• 7/15 of a liter

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

In the second word problem, how long did Michael jog?

• One-fourth of an hour

• Three-fourths of an hour

• Two-thirds of an hour

• One-third of an hour

Tags

CCSS.7.EE.B.3

What is the common denominator used to solve the second word problem?

• 15

• 12

• 20

• 10

After converting to a common denominator, what is the equivalent fraction of three-fourths?

• 8/10

• 9/12

• 6/9

• 7/14

How much longer did Michael jog than Joey?

• 3/12 of an hour

• 4/12 of an hour

• 5/12 of an hour

• 6/12 of an hour

Tags

CCSS.7.NS.A.3

What is the final answer for the second word problem?

• 7/15 of an hour

• 3/15 of an hour

• 9/12 of an hour

• 5/12 of an hour

Tags

CCSS.7.NS.A.3