Here is one way to solve this
problem:
Step 1: Understand the problem. Billy went shopping
and bought items on his credit card. We need to find
out how much he spent as this will be his new total
charges on his card for the month.
Step 2: Analyze the data. Billy bought items for
$45, $78, $35, and $109.
Step 3: Plan. We can choose an operation to help
solve this problem. We want to add the cost of the
items he bought.
Step 4: Estimate. Doing some mental math and rounding
in our head, we can estimate $50, $100, $50, $100
for the purchases and get an estimate of about $300.
Step 5: Solve the problem. We need to add the cost
of the items Billy bought.
45 + 78 + 35 + 109 = 267
Step 6: Examine our solution. Our answer is $267
spent by Billy and to be charged on his credit card.
Our answer is close to our estimate which is good.
Therefore our answer would be B, $267. |
