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Introducing algebra: Forming expressions
Silent Teacher Intelligent Practice Narration Your Turn š„ divided by 19 š„ shared between 19 š„ less than 19 Practice
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1) 3 more than š. 1) 3 less than š. 2) 5 lots š. 2) š divided by 5.
Worked Example Your Turn Write an algebraic expression for each of the following: Write an algebraic expression for each of the following: 1) 3 more than š. 1) 3 less than š. 2) 5 lots š. 2) š divided by 5. 3) š multiplied by š. 3) š less than š.
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7 more than š„ 7 less than š„ 9 less than š„ 9 lots of š„ 19 lots of š„ š„ divided by 19 š„ shared between 19 š„ less than 19 š„ less than 3 š„ less than š¦ š„ more than š¦ š„ multiplied by š¦ š„ divided by š¦ š„ divided by 3 š„ divided by 3 and then add 2 š„ divided by 3 and then subtract 2 š„ lots of 3 and then subtract 2 š„ lots of 3 and then squared š„ lots of 3 squared š„ squared and then multiply by 3
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7 more than š„ 7 less than š„ 9 less than š„ 9 lots of š„ 19 lots of š„
š„ divided by 19 š„ shared between 19 š„ less than 19 š„ less than 3 š„ less than š¦ š„+7 š„ā7 š„ā9 9š„ 19š„ š„ 19 š„ 19 19āš„ 3āš„ š¦āš„
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š„ divided by 3 and then add 2 š„ divided by 3 and then subtract 2
š„ more than š¦ š„ multiplied by š¦ š„ divided by š¦ š„ divided by 3 š„ divided by 3 and then add 2 š„ divided by 3 and then subtract 2 š„ lots of 3 and then subtract 2 š„ lots of 3 and then squared š„ lots of 3 squared š„ squared and then multiply by 3 š„+š¦ š„š¦ š„ š¦ š„ 3 š„ 3 +2 š„ 3 ā2 3š„ā2 3š„ 2 =9 š„ 2 š„ Ć 3 2 =9š„ š„ 2 Ć3=3 š„ 2
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