Table of Contents

## What is Subtraction?

Subtraction is a mathematical operation that calculates the difference between two numbers. The result is a number that represents the amount of objects or units that are left after the first number is subtracted from the second number.

## Facts:

1. In the United States, the Constitution grants each state a number of seats in the House of Representatives based on the state’s population.

2. The number of seats a state has in the House of Representatives is recalculated every 10 years, following the census.

3. The most recent census was conducted in 2010.

4. As a result of the 2010 census, the population of the United States grew by more than 9 million people, and the number of seats in the House of Representatives increased from 435 to 437.

5. The increase in the number of seats means that two new congressional districts have been created in the United States.

6. These two new districts are located in Arizona and Texas.

7. The population of each of these districts is approximately equal to the population of the average congressional district in the United States.

8. The first election to fill the two new districts will take place on November 6, 2012.

9. The candidates who are running for office in these two districts are:

– Arizona’s 2nd District: Ron Barber (D) and Martha McSally (R)

– Texas’ 36th District: Lloyd Doggett (D) and Bill Flores (R)

## Subtraction of Larger Number from Small Number:

The subtraction of a larger number from a smaller number is the process of determining the difference between the two numbers. In mathematical terms, this process is known as subtraction. The subtraction of a larger number from a smaller number can be accomplished using a number line.

To subtract a larger number from a smaller number, first line the numbers up on a number line. The larger number should be on the right, and the smaller number should be on the left. Then, subtract the numbers by moving from the right to the left. The difference between the two numbers is the result of the subtraction.

For example, if you want to subtract 5 from 2, you would line up the numbers on a number line. The 5 would be on the right, and the 2 would be on the left. Then, you would subtract the numbers by moving from the right to the left. The difference between the two numbers is 3.

## Subtraction puzzles: Fact family subtraction

In these subtraction puzzles, students must use the fact families to solve the problems. The first problem is solved for them.