Using Parentheses to Make Equations True with Fractions and Decimals

The video tutorial explains how adding parentheses can make equations with fractions or decimals true. It demonstrates this through various examples, showing how parentheses dictate the order of operations and can change the outcome of expressions. The tutorial covers story problems, simple arithmetic expressions, and equations involving fractions and decimals, emphasizing the importance of parentheses in achieving correct results.

Why are parentheses important in mathematical equations?

• They indicate which operations to perform first.

• They help in organizing the numbers.

• They are used only in complex equations.

• They make equations look neat.

In the expression 2 times 5 minus 3.1, what is the result when parentheses are added around 5 minus 3.1?

• 10

• 1.9

• 3.8

• 6.9

How can the equation 3.5 minus 2 minus 0.5 be made true?

• By adding parentheses around 3.5 minus 0.5

• By adding parentheses around the entire equation

• By adding parentheses around 2 minus 0.5

• By adding parentheses around 3.5 minus 2

What is the correct result of 4/8 plus 1/8 times 3 when parentheses are used correctly?

• 5/8

• 3/8

• 1 and 7/8

• 7/8

How does adding parentheses affect the equation 4/8 plus 1/8 times 3?

• It simplifies the equation.

• It has no effect.

• It makes the equation longer.

• It changes the order of operations.

In the equation 4.2 plus 6 divided by 2, what is the correct result when parentheses are added around 4.2 plus 6?

• 3

• 10.2

• 7.2

• 5.1

What is the final outcome of 4.2 plus 6 divided by 2 when solved without parentheses?

• 5.1

• 7.2

• 3

• 10.2