Solving Multistep Word Problems with Positive and Negative Decimals

This lesson teaches how to solve multistep word problems involving positive and negative decimals. Using a scenario where Henry wants to buy a video game, the lesson demonstrates how to calculate contributions and determine if Henry has enough money. It emphasizes the importance of checking if the final answer is reasonable and provides a mathematical approach to solving the problem using expressions and order of operations.

What is a common mistake students make when solving multistep word problems?

• They use the wrong numbers.

• They don't check if their answer is reasonable.

• They forget to multiply.

• They skip steps in the problem.

How much does Henry's mom contribute to his savings?

• $8.00

• $7.20

• $6.40

• $5.00

What is the total amount Henry has after his mom's contribution?

• $32.00

• $38.40

• $40.00

• $42.00

What is the first step in solving the problem using a mathematical expression?

• Convert the percentage to a decimal and multiply.

• Subtract the cost of the game from Henry's savings.

• Divide the total savings by the cost of the game.

• Add Henry's savings to his mom's contribution.

How much more money does Henry need to buy the video game?

• $2.50

• $5.20

• $3.60

• $4.00