2006-12-30 23:23:31 · 13 answers · asked by Shelly P 1 in Science & Mathematics ➔ Mathematics
22/7 - 13/8 = 176/56 - 91/56 = 85/56 = 1 29/56. Note- Get a common denominator 56 and work as shown.
2006-12-30 23:32:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
If it is a mixed fraction then the below one is right
3 1/7 - 1 5/8 = 22/7 - 13/8 = (176-91)/56 = 85/56 = 1 29/56
else if it is for fun and u have written 31/7 - 15/8 as 3 1/7 - 1 5/8
then the answer will be the below one
31/7 - 15/8 = (248-105)/56 = 143/56 = [ 2 31/56 ]
2006-12-30 23:39:08 · answer #2 · answered by Cool Sun 2 · 0⤊ 0⤋
When given MIXED FRACTIONS, the best thing to do FIRST is to change the mixed fractions to IMPROPER FRACTIONS.
Multiply 3 times 7 and add 1 (the numerator).
Doing this, we get: 22/7.
Do the same for 1_5/8.
So, 1 and 5/8 becomes 13/8.
Next: Look for the LCD.
To do so, multiply BOTH denominators.
So, 7 times 8 = 56 = our LCD.
We now have to DIVIDE the LCD by EACH denominator and then MULTIPLY the quotient by EACH numerator.
7 into 56 = 8 and 8 times 22 = 176
8 into 56 = 7 and 7 times 13 = 91
We now have:
(176 - 91)/56, which becomes 85/56.
Can we reduce 85/56 any more?
No, we cannot.
Final answer is 85/56 or as a mixed fraction we have 1_29/56
Guido
2006-12-31 01:12:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋
3 1/7 - 1 5/8
= 22/7 - 13/8
L.C.M. is 56
= 22/7*8/8
= 176/56
= 13/8*7/7
= 91/56
=176/56 - 91/56
= 85/56
Hence the answer is 85/56...
2006-12-31 01:25:32 · answer #4 · answered by Akshitha 5 · 0⤊ 0⤋
This is a mixed fraction.
So, first step is change into a improper fraction.
So,
3*7=21
21+1=22
3 1/7=22/7
8*1=8
8+5=13
1 5/8=13/8
3 1/7-1 5/8=22/7-13/8
Next step is addition
For addition the denominator should be same
so, changing the denominator
22/7=3.1428571
13/8=1.625
22/7-13/8=3.148571-1.625
=1.523571
2006-12-31 01:03:48 · answer #5 · answered by dimplesoft 3 · 0⤊ 0⤋
3 1/7-1 5/8
=22/7-13/8
multiplying 22 by 8 and multiplying 13/7,
(22*8-13*7)/7*8
=(176-91)/56
=85/56
85/56 is the answer.
2006-12-30 23:43:47 · answer #6 · answered by tarena 2 · 0⤊ 0⤋
3 1/7 - 1 5/8 =
22 / 7 - 13 / 8 =
176/56 - 91/56 =
85/56 =
1 29/56
- - - - - - - - - -s-
2006-12-31 03:07:58 · answer #7 · answered by SAMUEL D 7 · 0⤊ 0⤋
22/7 - 13/8 = 176/56 - 91/56
= 85/56
= 1 29/56
2006-12-31 00:55:48 · answer #8 · answered by _PeTaL_D`oR_ 2 · 0⤊ 0⤋
=22/7-13/8
=22*8/7-13*7/8
=176/56-91/56
=85/56
=1 29/56
2006-12-31 01:14:58 · answer #9 · answered by openpsychy 6 · 0⤊ 0⤋
1) Change to top heavy fractions:
22/7- 13/8
2) LCM= 8x7 = 56
3) Rewrite 176/56 - 91/56 =85/56
4) Change back to whole number and fraction
1 29/56
2006-12-31 01:46:51 · answer #10 · answered by Anonymous · 0⤊ 0⤋