Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Determine the value of algebraic expression |
Grade: 7-a Lesson: S2-L1 |
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 \$100/(6b + 5) - 5\$ when b = 5.
Step 1a
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Given expression. |
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Explanation:
Given expression \$100/(6b + 5) - 5\$ is an algebraic expression in variable b and value of b = 5. |
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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 = 5 in the expression. \$100/(6b + 5) - 5\$ \$=> 100/(6(5) + 5) - 5\$ |
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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 \$=> 100/(30 + 5) - 5\$ \$=> 100/35 - 5\$ \$=> (100 - 175)/35 \$ \$=> - 75/35 \$ |
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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 5 (or) do cancellation \$=> - cancel(75)^(15)/cancel35^7\$ \$=> - 15/7\$ |
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