Math

By: Annabelle Harris period 5-6

Adding Fractions

Step 1: find the common denominator

Step 2: change the fraction by multiplying the numerator by the same number you multiplied the denominator by unless the denominators are the same number

Step 3: add the numerators together

Step 4: Simplify if the answer is not in simplest form

Step 5: You Did It!!!!!!!!!!!!!!!!!!

Example:

1/4 +2/4 = 3/4


2/3+2/5=1 1/15

5x3=15

2x5=10

2x3=6

6/15+10/15= 16/15

Simplify

16/15= 1 1/15

Subtracting Fractions

Step 1: find the common denominator

Step 2: change the fraction by multiplying the numerator by the same number you multiplied the denominator by unless the denominators are the same number

Step 3: subtract the numerators together

Step 4: Simplify if the answer is not in simplest form

Step 5: You Did It!!!!!!!!!!!!!!!!!!

Example:

2/3-1/3=1/3


3/4-2/5=1 3/20

4x5=20

3x5=15

2x4=8

15/20-8/20=23/20

Simplify

23/20=1 3/20

Multiplying Fractions

Step1: multiply across

Step2: Simplify

Example:

3/4x2/5=3/10

3x2=6

4x5=20

6/20

Simplify

1,6,2

1,20,2

6/2=3

20/2=10

3/10

Dividing Fractions

Step1: KEEP the first number the same

Step2: Change the division problem to multiplication

Step3: FLIP the second number

Step4: multiply

Step5: simplify

Example:

2/3/3/4=8/9

2/3/4/3=

2x4=8

3x3=9

8/9

There is nothing to simplify

Here are some helpful links and videos for adding,subtracting,multiplying and dividing fractions

Multiplyin' Fractions

Adding and Subtracting Decimals

Step 1: Line the decimals up in vertical columns
Step 2: Add or subtract the decimals like a normal addition or subtraction problems
Step 3: your decimal doesn't move carry it down

Example:

1.1 +
1.1
-----
2.2

3.3 -
2.1
-----
1.2

Multiplying Decimals

Step 1: Line up your decimals in vertical columns
Step 2: Multiply like a normal multiplication problem
Step 3: Count the digits behind the decimal
Step 4: place your decimal to the left how ever many digits you counted

Example:

5.1 x
1.5
-----
.55

Dividing Decimals

Step 1: Move the decimal that is outside the house to make it a whole number
Step 2: Move the decimal in the house the same number of digits as you did to the first decimal
Step 3: Divide like a normal division problem
Step 4: Add your decimal

Example:

5.0/1.0

50/10=5

Here are some helpful videos: