Justin P's Last Fraction Post

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Adding Fractions

Question 1: 1 3/4 + 1 1/8= 2 7/8
First off you have add up the whole numbers. So we add 1 to 1 and we get 2 (1+1=2).
Second you have to find the common denominator. So we multiply 4 to 8 and we get 32. (4x8=32). Since the half of 32 is 16, we find out if 4 can go into 16 and if 8 can go into 16.
So first we list the multiples of 4 and 8 (4=4,8,10,12,14,16,20)(8=8,16)(the common factor is 16. So we found out that there was and it was 16.So we put the 16 as a denominator.

Question 2: 2 4/5 + 1 1/2 = 4 3/10
i made denominator because 2x5 is 10.Then I made the numerator 8 because 5 fits into 10, 2 times. Then I made the other numerator 5 because 2 fits into 10, 5 times.I knew that 8=5 would make 13 and 13/10 is an improper fraction so i divided 13 to 10. 13 divided by 10 equals 1 and 3/10. i know there is 3 more wholes so i add 3 to 1 and 3/10 which made 4 and 3/10.

Subtracting Fractions
To subtract fractions, you (once again) must have the same denominator. Once you have that, just subtract the numerators.

Multiplying Fractions
When you multiply fractions, you multiply the numerators, then multiply the denominators.

Multiplying mixed Fractions
To multiply mixed fractions, change the mixed fraction to an improper fraction, then multiply the numerators and denominators.

Dividing Fractions
There are a few ways you can divide fractions.

Dividing improper Fractions

This time, I will also show you how to solve it using a reciprocal. It is the inverse of the denominator.

6.One Week, Kristi worked 3 days at a department store for 31/2 each day. She was Paid $9/h a) How many hours did Kristi Work that week? Show your thinking well first off you need to make a short answer sentence. Kristi Worked 10 1/2 Hrs that week

8. A sailboat is sailing at 81/2 km/h. If the weather conditions and the current do not change, how far will the sailboat travel in 1 1/3h? Show your thinking the sail boat will travel 11.33km.
i simplified 2/6 to 1/3.

4)Problem 2

Problem 3



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