Work Backwards Method in Mathematics

The video tutorial explains how to solve a work backwards problem using a scenario where Thomas buys books at a bookstore. The problem involves determining how much money Thomas started with, given his transactions. The tutorial demonstrates setting up an equation and solving it by working backwards, using opposite operations. The solution is verified by checking the calculations in the forward direction.

What is a work backwards problem?

• A problem where you guess the answer first.

• A problem where you use only subtraction.

• A problem where you solve equations in reverse order.

• A problem where you start with the final result and work towards the beginning.

What did Thomas buy first at the bookstore?

• A 39 Clues book series

• A comic book

• A Harry Potter book

• A magazine

How much money did Thomas's mom give him?

• $10

• $15

• $20

• $25

What is the first step in the work backwards method?

• Start with the initial amount

• Start with the final amount

• Add all the expenses

• Subtract all the expenses

What operation is used in the work backwards method instead of subtraction?

• Subtraction

• Division

• Multiplication

• Addition

What is the result of 19 plus 37 in the work backwards method?

• 48

• 60

• 56

• 45

What is the next step after calculating 56 in the work backwards method?

• Add 20

• Subtract 12

• Subtract 20

• Add 12

What is the final amount Thomas started with?

• $48

• $36

• $19

• $56

How can you verify the solution of a work backwards problem?

• By guessing the initial amount

• By working forwards from the initial amount

• By using a calculator

• By asking someone else

What is the result of 48 minus 12 in the verification process?

• 19

• 48

• 56

• 36