Math? Help Please. Fractions and Decimals and Stuff?

Question

1) 16/38 =
2) 9/10 = ?/70
3)5/6, 7/18, 5/9, 2/72 =
4)6 1/8 + 4 3/8 =
5)14 3/8 - 10 5/8
6)17 X 4/2 =
7)11 4/5 <=== what type of fraction is this called?

Please show your work so i can learn. Thanks for the tutoring help :D

Answer 1

1. 16 divided by 38= .421 or you can reduce the fraction by dividing each of the numbers by 2, so the fraction can be reduced to 8/19.
2. 63/70, to get this answer 9 x 7 = 63. 10 x7= 70
3. the denonimator needs to 72, so you need to make each fraction have a 72 as the denonminator. 12(5/6)= 60/72, 4(7/18)= 28/72. 8(5/9)= 40/72. 60/72+ 28/72+ 40/72= 168/72. can be reduced to 2.333, by dividing 168 by 72.
4. add 6 and 4 to equal 10, then add 1 and 3 to equal 4 over the 8, answer: 10 4/8, 0r 10 1/2 when reducing the 4/8.
5. make 14 3/8 to 13 13/8, then subtract 10 from 13 to equal 3. then subtract 13/8 - 5/8 to equal 8/ 8 or 1. then 3 +1 = 4,so the answer is 4.
6 4/2= 2, 17 x 2 = 34.
7. unable to reduce this further.
hope this makes sense to you.

Answer 2

16/38 = 8/19 =0.424
( 8/19 is 16/38 in its lowest term, this is because both 16 and 38 are divisible by 2) as a decimal the patter 424 should repeat itself but use a calculator to check the answer.
To change a faction to a decimal divide the numerator by the denominator, in this case divde 16 by 38, or 8 by 19.

9/10 = ?/70,
Solution
90/10 =?/70 (cross multiply)
(70 x 9)/10 = ?
630/10 = ?
63 = ?


5/6, 7/18, 5/9, 2/72

Solution
I am not quite sure what you wanted to do with this question so I did a number of things with it.
The fracions in the lowest erms can be written as 5/6, 7/18, 5/9, 1/34 ( Note that both the denominator and numerator of 2/72 are multiples of 2 so 2/72 becomes 1/34)
Or they can be written in decimals as 0.8333(the 3 is recurring), 0.277 (the 7 is recurring), 0.555 (5 is recurring), 0.029
* I am not sure about the decimal aswers for this question b/c I did it mentally so check the answers on a calculator.


6 1/8 + 4 3/8
Solution
6 1/8 + 4 3/8 = (49 + 35)/8
(49+ 35)/8 = 84/8
84/8 = 10 4/8 = 10 1/2


14 3/8 -10 5/8
Solution
14 3/8 - 10 5/8 = (115 - 85)/8
(115 - 85)/8 = 30/8
30/8 = 3 6/8 = 3 3/4


17 x 4/2
Solution
17 x 4/2 = 17/1 x 4/2
17/1 x 4/2 = 68/2
68/2 = 34

11 4/5 is known as a Mixed fraction b/c it contains both a whole umber and a fraction.


I hope that helped.
Good luck

Answer 3

(1) 16/38 = 8/19
(2) 9/10 = 63/70
(3) 5/6, 7/18, 5/9, 2/72 = 5/6, 7/18, 5/9, 1/36
(4) 6 1/8 + 4 3/8 = 10 4/8 = 10½
(5) 4 3/8 - 10 5/8 = 35/8 - 85/8 = -50/8 = -6 1/4
(6) 17 x 4/2 = 17 x 2 = 34
(7) 11 4/5 = 59/5

Answer 4

16/38 = 0.4210526... = 8/19
16 divided by 2= 8
38 divided by 2= 19

9/10 = 63/70
9 *7= 63
10 *7= 70

is that multiplication in number 3

6 1/8 + 4 3/8 = 10 1/2
6+4=10 & 1/8 +3/8=4/8=1/2

14 3/8 - 10 5/8= 13 3/4
14-10=4 & 3/8-5/8=-2/8
borrow one
3 & 11/8-5/8= 6/8=3/4

17 * 4/2 = 34
17*2/1
17*2=34
11 4/5 is a mixed number

Answer 5

1) 8/19

four is easy! 6 plus 4= 10 and 1 plus 4 equals 5. so.......

your answer is 10 and 4/8 or 10 1/2{Simplified}

The trick is to not add the bottom numbers of a fraction.

number 6) You put a 1 under 17 and multiply. 17 times 4 is 68 and 1 times 2 is two so you have an improper fraction. No problem! Just see how many times two goes into 68, which is 34, and thats your answer! Just 34.

Answer 6

#7 is a mixed fraction.

#2, ten times what equals 70? 7. so multiply 9 times7 to get 63 and so your answer is

9/10= 63/70.

Answer 7

http://www.bacsoftware.co.uk/fcalc1/