Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Determine the value of algebraic expression |
Grade: 7-a Lesson: S2-L3 |
Explanation: The best way to understand algebra is by looking at some examples. Take turns and read each example for easy understanding. |
Examples:
1. Determine the value of expression \$30/(b^2) + b -3\$ when b = 2.
Step 1a
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Given expression. |
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Explanation:
Given expression \$30/(b^2) + b -3\$ is an algebraic expression in variable b and value of b = 2. |
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Step 1b
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Substitute the value of variable |
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Explanation: Substitute the value of variable b = 2 in the expression. \$30/(b^2) + b -3\$ \$=> 30/(2^2) + (2) - 3\$ |
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Step 1c
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Perform the opreartions among the terms to determine the value of expression. |
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Explanation:
Perform operations among the terms \$=> 30/4 + 2 - 3\$ \$=> (30 + 8 - 12)/4 \$ \$=> (38 - 12)/4 \$ \$=> 26/4 \$ |
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Step 1d
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Convert the fraction into it’s lowest form. |
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Explanation: Divide numerator and denominator with 2 (or) do cancellation \$=> cancel(26)^(13)/cancel4^2\$ \$=> 13/2\$ |
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