Question

You want to determine the total amount of data stored on a server.

User A has 3550 GB of data stored on the server.
User B stores 4000 GB of data.
User C stores 2450 GB.
User D stores 1010 GB of data.
User E stores 7000 GB of data on the server.
Without using a calculator, use the properties of operations to determine the total amount of data stored on the server.

A
1801 GB

B
18,010 GB

C
19,010 GB

D
1901 GB

Answer 1

B

18,010 GB

Explanation:

Did it in edge

here is the explanation down below:

The correct answer is B: eighteen thousand ten gigabytes.

Using the Commutative and Associative Properties of Addition, you can arrange the data values as shown to make them easier to add.

First, add four thousand and seven thousand to get eleven thousand.

Then, add three thousand five hundred fifty and two thousand four hundred fifty to get six thousand.

Next, add eleven thousand and six thousand to get seventeen thousand.

Last, add seventeen thousand and one thousand ten to get eighteen thousand ten.

Answer 2

One way to approach this problem without using a calculator is to group the numbers by their place value (i.e., thousands, hundreds, tens, and ones), and then add them together.

For example,

For thousands:

User A has 3 thousands,

User B has 4 thousands,

User C has 2 thousands,

User E has 7 thousands.

There are no thousands for User D.

So the total number of thousands is 3+4+2+7 = 16 thousands.

For hundreds:

User A has 550 hundreds (since 3550 = 3 x 1000 + 550),

User B has 0 hundreds (since 4000 is a multiple of 1000),

User C has 450 hundreds (since 2450 = 2 x 1000 + 450),

User D has 10 hundreds,

User E has 0 hundreds (since 7000 is a multiple of 1000).

So the total number of hundreds is 550+0+450+10+0 = 1010 hundreds.

For tens and ones:

Since all the numbers are in thousands or hundreds, there are no tens or ones to add.

Therefore, the total amount of data stored on the server is:

16 thousands + 1010 hundreds = 16,100 GB