GED Math: Addition and Subtraction of Whole Numbers

Welcome to Chapter 2 of the ultimate GED Math Course from UltimateGED.com. In this Chapter, we will be looking at Operations on  Whole Numbers. We will be looking at Addition and Subtraction in this video and we will look at other operations like exponent, multiplication and division in subsequent videos. 

This video is going to be brief since most students are familiar with this topic. We have a full video  with about 10 examples on addition and subtraction of whole numbers from our pre-algebra course. We’ll put a link in the description for those who need extra help

Question 3

John sold $345 worth of goods on Monday, $843 worth of goods on Wednesday and $1524 of goods on Friday. How much money did he receive on those three days. (Do NOT use a Calculator).

You are usually not allowed to use a calculator on GED Math questions involving operations on whole numbers.

This question is asking for the total amount of money. You will therefore have to add the three amounts. The work involved in adding whole numbers is to align the numbers from the unit column(or the right). Add them starting form the unit column and carry values to the next column if you have 2 digits values.

So here we have 345, then 843, and then 1524. Please make sure they are aligned starting from the unit column( that’s the right). It cannot look like any of these. All three numbers must align at the right.

Let’s add. Starting from the right. 

5 + 3 + 4 is 12. Because it’s a two digit number, we will put the 2 here and carry the 1 to the next column. 

We move to the next column. We have 1 + 4 + 4 + 2. This is 11. Again this is a two digit number. We will keep the 1 and carry 1 to the next column. 

We move to the next column. We have 1 + 3 + 8 + 5. This is 17. We have a two digit number. We will keep the 7 and carry the 1 to the next column.

Finally, we have 1 + 1 here. This is 2.

So our final answer is $2,712

Question 4.

A business woman made $34,937 in sales. She then pays $3,556 in taxes on that money. How much money is left. (Do NOT use a Calculator).

This is a typical subtraction question. Here you are supposed to subtract the $3556 from $34937. Like we did in addition, you’ll have to align the values from the unit column. That’s aligning from the right.

So we have 34937 minus 3556. 

We start from the units column. 7 minus 6 is 1. 

We move to the next column. we have 3 minus 5. Since 3 is less than 5, we will have to borrow 1 from the next column. 

This is 9, when we borrow 1, it now becomes 8. When you borrow, the value is 10, so we will add 10 plus 3 to get 13. For simplicity sake, we will say that when you borrow, you’ll just put 1 in front of your number. So we have 13 minus 5, which is 8.

Next we know we have 8 here now. 8 minus 5 is 3.

We move to the next column. 4 minus 3 is 1.

Finally, we have 3 here. Nothing to subtract from, so we have 3 minus zero which is 3.

So the amount of money left is $31381.

We will end this video here. If you need more help, check out the link in the description to get the full Pre-Algebra video on Addition and Subtraction of whole numbers.

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Thank You, have a great day. See you in the next video.