Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Substitue the different variable values in the expressions using fractions |
Grade: 6-a Lesson: S2-L8 |
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 \$3/4 - 6a + 5/a\$ when a = 4.
Step 1a
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Given expression. |
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Explanation:
Given expression \$3/4 - 6a + 5/a\$ is an algebraic expression in variable r and value of a = 4. |
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Step 1b
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Perform operations. |
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Explanation: Substitute the value of variable a = 4 in the expression. \$3/4 - 6a + 5/a\$ \$=> 3/4 - 6(4) + 5/(4)\$ |
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Step 1c
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substitute the value of variable and determine the value of expression. |
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Explanation:
Perform operations among the terms \$=> 3/4 - 6(4) + 5/(4)\$ \$=> 3/4 - 24 + 5/4 \$ \$=> 3/4 + 5/4 - 24 \$ \$=> (3 + 5)/4 - 24 \$ \$=> 8/4 - 24 \$ \$=> (8 - 96)/4 \$ \$=> - 88/4 \$ |
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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 4 (or) do cancellation \$=> - cancel(88)^22/cancel(4)^1\$ \$=> - 22\$ |
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