A packet of potato chips costs half a dollar. A teacher buys enough packets for 10 students to have one each. How much does she pay in total?
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A packet of potato chips costs half a dollar. A teacher buys enough packets for 10 students to have one each. How much does she pay in total?
To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: The problem gives us:
Cost per packet of potato chips is dollars.
Number of packets = Number of students = 10.
Step 2: We'll use the formula:
Step 3: Plugging in our values, we get:
Therefore, the solution to the problem is dollars.
$
\( 20.1:10= \)
You're finding the total cost of multiple items. Think of it as: $0.50 + $0.50 + $0.50... (10 times). Multiplication is just a shortcut for repeated addition!
Half a dollar means 50 cents or $0.50. It's exactly half of $1.00, just like how half of any whole number gives you a decimal ending in .5
The dollar sign ($) shows the units, but you can calculate with just the numbers: 0.50 × 10 = 5.00. Just remember to add the $ back to your final answer!
Use estimation! If each packet costs about 50 cents, then 10 packets should cost about half of $10 = $5. Your answer makes perfect sense!
You probably calculated $0.50 × 100 instead of × 10. Remember: there are only 10 students, so the teacher only needs 10 packets, not 100!
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