Niu has decorated x cards. He started with 24 stickers, and he used 4 stickers per card. Which expressions can we use to describe how many stickers Niu has left?
Q. Niu has decorated x cards. He started with 24 stickers, and he used 4 stickers per card. Which expressions can we use to describe how many stickers Niu has left?
Identify Sticker Total: Identify the total number of stickers Niu started with.Niu started with 24 stickers.
Determine Stickers per Card: Determine the number of stickers used per card. Niu used 4 stickers for each card.
Write Total Stickers Expression: Write an expression for the total number of stickers used.If Niu decorated x cards, and each card used 4 stickers, then the total number of stickers used is 4 times x, which can be written as 4x.
Write Remaining Stickers Expression: Write an expression for the number of stickers Niu has left.To find out how many stickers are left, subtract the total number of stickers used from the total number Niu started with.The expression is 24−4x.
Check Expression Validity: Check if the expression makes sense for different values of x. If x is 0 (Niu decorated no cards), then Niu should have all 24 stickers left. Plugging in 0 for x gives us 24−4(0)=24, which is correct. If x is 6 (Niu decorated 6 cards), then Niu should have used 24 stickers. Plugging in 6 for x gives us x3, which is also correct.
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