# Math (Check

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1.Subtract and Simplify
2/3 - 1/5 = 1/2

2.Multiplu
4/5 * 6/7 = 24/35

3.subtract write an mixed numeral for the answear

20, 1/9
14, 7/15

• Math (Check -

2. is correct.

3. 20 1/9 - 14 7/15 =

You need to find a common denominator. 45 is divisible by 9 and 15

20 1/9 - 14 7/15 = 20 5/45 - 14 21/45

Now we need to change the first number to get a fraction larger than 21/45

20 5/45 = 19 50/45

19 50/45 - 14 21/45 = 5 29/45

• Math (Check -

Is this correct?

1. 1/3 > 7/10

2. prime factors of 441 are 1,3,9,7,49,441

3. prime factors of 27 are 1,3,6,9,27

• Math (Check -

1. 1/3 > 7/10
This is not correct. 1/3 is not greater than 7/10.

30 is the common denominator -- so 10/30 is less than 21/30.

2. Right!

3. Right!

1/3 = 10/

• Math (Check -

(4.9*10^-6)*(2*10^-4)

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