Solve: 10·10²·10⁻⁴·10¹⁰ Using Powers of 10

Question

101021041010= 10\cdot10^2\cdot10^{-4}\cdot10^{10}=

Video Solution

Solution Steps

00:00 Solve
00:03 When multiplying powers with the same base, we add the exponents
00:09 This formula is relevant for any number of bases
00:15 We'll use this formula in our exercise
00:19 A number without an exponent is actually raised to the power of 1
00:29 All powers have the same base, therefore we can use the formula
00:36 We'll sum all the exponents
00:43 We'll calculate one operation at a time and then sum
00:49 And this is the solution to the question

Step-by-Step Solution

We use the power property to multiply terms with identical bases:

aman=am+n a^m\cdot a^n=a^{m+n} Keep in mind that this property is also valid for several terms in the multiplication and not just for two, for example for the multiplication of three terms with the same base we obtain:

amanak=am+nak=am+n+k a^m\cdot a^n\cdot a^k=a^{m+n}\cdot a^k=a^{m+n+k} When we use the mentioned power property twice, we could also perform the same calculation for four terms of the multiplication of five, etc.,

Let's return to the problem:

First keep in mind that:

10=101 10=10^1 Keep in mind that all the terms of the multiplication have the same base, so we will use the previous property:

1011021041010=101+24+10=109 10^1\cdot10^2\cdot10^{-4}\cdot10^{10}=10^{1+2-4+10}=10^9

Therefore, the correct answer is option c.

Answer

109 10^9