Subtracting Numbers in Standard Form 8.9x10^7 - 7.3x10^6

Published on March 24, 2026

Pre-Algebra

Calculate the difference between two numbers given in scientific notation and express the final result in standard form by aligning the powers of ten.

Question

Answer

The problem asks us to work out the following expression and give the answer in standard form:

To subtract numbers given in standard form, we must first ensure that both numbers have the same power of 10. The powers are

and

. We should convert the term with the smaller power (

) to the higher power (

We use the relationship:

Convert

to have a power of

Now substitute this back into the original expression:

Since both terms now have the same power of 10, we can subtract the coefficients:

Perform the subtraction:

So the result is:

The answer

is in standard form because the coefficient

satisfies the condition

Alternatively, we could convert both to have the power

.
Convert

to have a power of

Now substitute this back into the original expression:

Perform the subtraction:

So the result is:

We need to give the answer in standard form. To convert

to standard form, we adjust the coefficient so it is between 1 and 10:

Substitute this back:

Both methods yield the same result.

The answer in standard form is

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Subtracting Numbers in Standard Form 8.9x10^7 - 7.3x10^6

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