1-3 lesson adding and subtracting fractions

1-3 lesson adding and subtracting fractions

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Today we will add and subtract fractions by ensuring the denominators are the same.

• If the denominators are the same, we add or subtract the numerator and bring over the denominator then simplify the fraction

• If the denominators are different, we will find a common denominator and convert the fractions then perform the above operation.

Adding fractions examples

Multiple Select

add this fraction and simplify.  check all that apply

 $\frac{2}{5}\ +\frac{3}{5}=$  

• 5/10

• 5/5

• 1

• 5

Multiple Choice

find a common denominator to add these fractions.

 $\frac{3}{4}+\frac{3}{5}=$  

• 6/9

• 2/3

• 27/20

• 6/20

Poll

How do you feel about adding fractions

• I can do both like and unlike denominators and simplify

• I can do like fractions and simplify

• I struggle with simplifying

• I have a difficult time with all of it

subtracting

• It's the same as addition but now we subtract the numerators

• Just like addition, we need like denominators

subtracting

Poll

how do you feel about subtracting fractions?

• 2 thumbs up

• 1 thumb up

• thumb sideways

• thumb down

Multiple Choice

 $\frac{3}{7}-\frac{2}{9}=$  

•  $\frac{1}{2}$  

•  $\frac{1}{-2}$  

•  $\frac{13}{63}$  

•  $\frac{41}{63}$  

Now for the assignment

• get it in zoom chat as a link

• or, get it in canvas