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svet-max [94.6K]
3 years ago
7

What is the first step when adding 1.45 x 108 and 3.9 x 107?

Mathematics
1 answer:
garik1379 [7]3 years ago
8 0

We need to add 1.45 x 10^8 and 3.9 x 10^7.

Please see..

We have given numbers in scientific form.

<em>We can't add the decimal numbers in front, because those numbers are being multiplied with 10 exponents and the exponents of 10's are not same.</em>

<em>So, we always convert the exponents of 10 as same.</em>

<em>1.45 x 10^8 could be converted to 14.5 x 10^7 to get exponent of 10 as 7 as other number 3.9 x 10^7 also has exponent of 10 as 7.</em>

<em>After this step we can just add the 14.5  and 3.9 and put × 10^7 with it.</em>

So, first correct step is:

<h3> 2. Convert 1.45 x 108 to 14.5 x 107.</h3>
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