Question

The Software Company earned 2,247,852,199 dollars last year. This year they earned 3,000,962,245 dollars. Which is the best estimate of dollars earned last year and this year?A.4,000,000,000B.5,000,000,000C.5,248,814,444D.6,000,000,000

Answer 1

You know the following information:

1. The amount of money (in dollars) earned last year was:

`2,247,852,199`

2. The amount of money (in dollars) earned this year, is:

`3,000,962,245`

Then, to estimate the sum (the total amount of money the Software Company earned in those two years, you can round the numbers to the nearest billion.

Having:

`2,247,852,199`

You need to look at the digit located in the Hundred millions place. Notice that this is:

`2`

Then, since:

`2<5`

You need can't round up. Then:

`2,247,852,199\approx2,000,000,000`

Now, having:

`3,000,962,245`

You can identify that the digit in the Hundred millions place is

`0`

Therefore:

`3,000,962,245\approx3,000,000,000`

Now you can add the numbers rounded:

`2,000,000,000+3,000,000,000=5,000,000,000`

Hence, the answer is: Option B.