Answer:
11 1 /20
Step-by-step explanation:
7 3/5 + 3 9/20
The common denominator is 20
7 3/5 *4/4 = 7 12/20
Add the mixed numbers
7 12/20
+3 9/20
----------------------
10 21/20
We have an improper fraction, subtract 20 and add 1 whole
10+1 1/20
11 1 /20
Answer: 1 and 1/20
Step-by-step explanation: To add mixed numbers, first add the fractions.
Since 3/5 and 9/20 are unlike fractions, we first need to find a common denominator which in this case is 20.
So we multiply the numerator and denominator of 3/5 by 4 to get 12/20 and 9/20 already has 20 in the denominator.
Now we can add the like fractions, 9/20 + 12/20, to get 21/20.
Next we add the whole numbers. 7 + 3 is 10.
So 7 and 3/5 + 3 and 9/20 is 10 and 19/20.
Now we can write this as the mixed number, 1 and 1/20.
