Simplify (10×2)^20 ÷ (2×10)^7: Exponential Division Problem

Insert the corresponding expression:

(10×2)20(2×10)7= \frac{\left(10\times2\right)^{20}}{\left(2\times10\right)^7}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:13 Let's start with the basics.
00:16 In multiplication, the order of numbers doesn't matter.
00:20 We'll use this idea in our exercise by switching the order of numbers.
00:31 Next, we're using a formula for dividing powers.
00:35 If you have A to the power of N divided by A to the power of M,
00:40 it equals A to the power of M minus N.
00:44 We'll apply this formula in our exercise.
00:47 And that's how we solve this problem.

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Insert the corresponding expression:

(10×2)20(2×10)7= \frac{\left(10\times2\right)^{20}}{\left(2\times10\right)^7}=

2

Step-by-step solution

To solve the problem, we first need to apply the exponent rules, specifically focusing on the "Power of a Quotient" rule. The given expression is:

(10×2)20(2×10)7 \frac{\left(10\times2\right)^{20}}{\left(2\times10\right)^7}

We can notice that both the numerator and the denominator have the same base, which is (10×2) or (2×10) (10 \times 2) \ or \ (2 \times 10) . Hence, let's simplify the base:

  • a=10×2=20 a = 10 \times 2 = 20

Thus, both the numerator and the denominator can be rewritten with the base a a :

  • a20 a^{20} for the numerator

  • a7 a^{7} for the denominator

Now, using the "Power of a Quotient" rule:

aman=amn \frac{a^m}{a^n} = a^{m-n}

We apply this rule to our expression:

a20a7=a207 \frac{a^{20}}{a^7} = a^{20-7}

This simplifies to:

a13 a^{13}

Substituting back the value of a a :

(2×10)13 \left(2 \times 10\right)^{13}

However, let's check the solution form given in the problem:

The solution hinted at is:

(2×10)207 \left(2 \times 10\right)^{20-7}

Indeed, it verifies our calculation that the expression simplifies to (2×10)13 \left(2 \times 10\right)^{13} .

The solution to the question is: (2×10)13 \left(2 \times 10\right)^{13}

3

Final Answer

(2×10)207 \left(2\times10\right)^{20-7}

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\( 112^0=\text{?} \)

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