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Step-4

Title: Substitute the varible value in the expression

Grade: 8-a Lesson: S2-L1

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Determine the value of an expression when a = 8, b = - 4, c = 2 \$ -a/b - b/c - c/a \$
2	Step	Now substitute a,b,c values in expression	\$ (-\cancel8^2)/\cancel(-4)^1 - \cancel(-4)^2/\cancel2^1 - \cancel2^1/\cancel8^4 \$
3	Step	After cancellation we get	\$ 2 + 2 - 1/4\$
4	Hint	Taking LCM as 4
5	Step	After simplification	\$ (8 + 8 - 1)/4 \$
6	Step	After adding we get	\$ 15/4\$
7		Answer	A

Step

Type

Explanation

Answer

Problem

Determine the value of an expression when a = 8, b = - 4, c = 2
\$ -a/b - b/c - c/a \$

Step

Now substitute a,b,c values in expression

\$ (-\cancel8^2)/\cancel(-4)^1 - \cancel(-4)^2/\cancel2^1 - \cancel2^1/\cancel8^4 \$

Step

After cancellation we get

\$ 2 + 2 - 1/4\$

Hint

Taking LCM as 4

Step

After simplification

\$ (8 + 8 - 1)/4 \$

Step

After adding we get

\$ 15/4\$

Answer