Question

practice

1. jonahs cell phone came with 64 gb of memory. he has used 15 gb. he then uses 5 mb of memory to record photos and videos from a trip. use the addition expression 64 + (-15) + (-5) to find how much memory is left on his phone.

Explanation:

Step1: Combine the negative - value terms

First, combine the amounts of memory used. We know that adding a negative number is the same as subtracting a positive number. So, $(-15)+(-5)=-(15 + 5)=-20$.

Step2: Subtract the total used from the initial amount

Now, we have the expression $64+(-20)$. Since adding a negative number is subtraction, $64+(-20)=64 - 20$.
$64-20 = 44$.

Answer:

44 GB