Question

Juno was working on simplifying the expression 24 + 3 + (-4 ) + 7. "I know!" he exclaimed. "It must be equal to 30, because 20 plus 10 is 30." a. Is Juno correct? Is the value of the expression 30?

Answer 1

Juno incorrectly combined the numbers in the expression. By correctly combining the positive numbers and then adding the negative number, the correct value of the expression is found to be 30.

Step-by-step explanation:

No, Juno is not correct. Let's simplify the expression step by step:

• First, combine the positive numbers: 24 + 3 + 7 = 34.
• Then, add the negative number: 34 + (-4) = 34 - 4.
• The result is 30.

This means that the value of the expression is actually 30, not 31 as Juno initially thought. It is important to follow the correct rules of arithmetic and to check your answer to confirm that it is reasonable, just as we did here.