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Zorluk: KolayDecimal Operations and Currency Word Problems

A recruit gets a haircut at the base exchange that costs $11.35\$11.35. If he pays with a $20.00\$20.00 bill, how much change should he receive in dollars?

Cevap: 8.65 dollars

Cevap

8.65
The correct change is found by setting up a subtraction equation where the cost ($11.35\$11.35) is subtracted from the payment amount ($20.00\$20.00). Proper alignment of the decimals and borrowing across the zeros gives exactly 8.658.65.

Adım Adım Çözüm

1
Align the decimals to subtract the cost of the haircut from the amount paid.
20.00−11.3520.00 - 11.35
To find the change due, you must subtract the total purchase cost from the cash provided.
2
Perform the subtraction, properly borrowing across the zeros in 20.00.
8.65
Subtracting 11.35 from 20.00 yields the exact amount of change owed.

Anahtar Kavram

Calculating change by subtracting decimals.
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