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Lesson Example Discussion Quiz: Class Homework

Step-4

Title: Calculate the expression

Grade: 8-b Lesson: S3-L4

Explanation: Hello Students, time to practice and review the steps. Let us take next 2-5 minutes to solve the steps for the problems. This is a good exercise to check your understanding of the concepts.Second student to identify and review important steps.Focus on understanding the concepts and application to solving problems step by step.

Lesson Steps

Steps	Problem	Solution
1	Evaluate the expression	\$ (4.5 × 10^-2)/(0.9 × 10^-3) \$
2	After simplification we get	\$ (45 × 10^-1 × 10^-2 )/(9 × 10^(-1) × 10^-3) \$ \$ => (45 × 10^(-1 + (-2)))/(9 × 10^(-1 + (-3))) \$ \$ => (45 × 10^-3)/(9 × 10^(-4) ) \$
3	After simplification we get	\$ (\cancel45^5 × \cancel(10^-3)^1 )/(\cancel9^1 × \cancel(10^-3)^(1) × 10^-1 \$
4	After cancellation we get	\$ 5/10^-1 \$
5	After simplification we get	\$ 5 × 10 = 50 \$
6	Answer	A = \$50\$

Steps

Problem

Solution

Evaluate the expression

\$ (4.5 × 10^-2)/(0.9 × 10^-3) \$

After simplification we get

\$ (45 × 10^-1 × 10^-2 )/(9 × 10^(-1) × 10^-3) \$

\$ => (45 × 10^(-1 + (-2)))/(9 × 10^(-1 + (-3))) \$

\$ => (45 × 10^-3)/(9 × 10^(-4) ) \$

After simplification we get

\$ (\cancel45^5 × \cancel(10^-3)^1 )/(\cancel9^1 × \cancel(10^-3)^(1) × 10^-1 \$

After cancellation we get

\$ 5/10^-1 \$

After simplification we get

\$ 5 × 10 = 50 \$

Answer

A = \$50\$