Working Backwards in Problem Solving

Kiley introduces the 'working backwards' strategy for solving math problems. She presents a word problem involving a piggy bank and demonstrates how to solve it by working from the end to the beginning. The solution is verified by solving the problem forwards. The video concludes with advice on when to use this strategy effectively.

What is the main idea behind the 'working backwards' strategy?

• To solve problems by starting from the end

• To solve problems by guessing the answer

• To solve problems by using a calculator

• To solve problems by starting from the beginning

In the word problem, what does Paul's mom do?

• She takes money from the piggy bank

• She adds $5 to the piggy bank

• She gives Paul $10

• She buys Paul an ice cream

What is the final amount of money Paul has at the end of the day?

• $20

• $10

• $5

• $7

What is the first step in solving the problem using the working backwards method?

• Add $5 to the final amount

• Subtract $2 for the ice cream

• Subtract $10 given by the grandmother

• Add $10 to the final amount

After subtracting the $10 given by the grandmother, how much money does Paul have?

• $12

• $8

• $15

• $10

What is the next step after finding out Paul had $10 before buying ice cream?

• Subtract $2 for the ice cream

• Subtract $5 from his mom

• Add $10 from his grandmother

• Add $5 from his mom

How much money did Paul have before his mom added $5?

• $5

• $12

• $10

• $7

What is the purpose of solving the problem forwards after working backwards?

• To verify the answer

• To find a different solution

• To practice more math

• To confuse the solver

What is the first step in verifying the solution by solving forwards?

• Add $10 from his grandmother

• Add $5 from his mom

• Subtract $5 from his mom

• Subtract $2 for the ice cream

After adding $5 from his mom, how much money does Paul have?

• $15

• $10

• $7

• $12