find the average:
1. 2/3 + 3/5
2. 1/6 + 2/3 + 5/9
3. 11/4 + 5/2 + 7/3
4. 3/4 + 3 + 6/7
2007-10-21 11:21:46 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Question 1
Av = (19 / 15) ÷ 3
Av = 19 / 45
Question 2
Av = (25 /18) ÷ 3
Av = 25 / 54
Question 3
Av = (91 / 12) ÷ 3
Av = 91 / 36
Question 4
Sum = 21/28 + 81/28 + 24/28 = 126/28
Av = (126 / 28) ÷ 3
Av = 42 / 23
2007-10-23 20:08:44 · answer #1 · answered by Como 7 · 0⤊ 0⤋
how do you find the average of any two numbers (even fractions): ADD them together, then divide by 2. 1/25 + 1/100 = 4/100 + 1/100 = 5/100 divding by 2... is same as multiplying by 1/2 so : 5/100 x 1/ 2 = 5/200 = which reduces to: 1/40
2016-05-24 01:40:29 · answer #2 · answered by ? 3 · 0⤊ 0⤋
1. 19/30
2. 25/54
3. 91/36 (2 and 19/36)
4. 133/84 (1 and 49/84)
2007-10-21 11:29:06 · answer #3 · answered by stucongress 1 · 0⤊ 0⤋
You begin by saying "find the average", but the actual problems are indicating "find the sum". Which do you mean?
2007-10-21 11:26:44 · answer #4 · answered by Michael M 7 · 0⤊ 0⤋
Add up all fractions and divide by how many you added
And for God's sake do your Home on your own, its not that hard.
Hope that helps :)
2007-10-21 11:28:42 · answer #5 · answered by Guts 3 · 0⤊ 0⤋
Add up all fractions
Divide by how many you added
I hope you didn't want someone else to do you homework!
Hope that helps
2007-10-21 11:25:30 · answer #6 · answered by Anonymous · 0⤊ 0⤋
(a+b)/2
1 (10+9)/(2x15) = 0.6333
2. (3+12+10)/(18x3)
etc
2007-10-21 11:33:05 · answer #7 · answered by Anonymous · 0⤊ 0⤋
1)10/15+9/15=19/15
2)3/18+12/18+10/18=25/18
3)33/12+30/12+28/12=91/12
4)21/28+84/28+24/28=133/28
2007-10-21 11:29:57 · answer #8 · answered by john 4 · 0⤊ 2⤋
cross multiply and do you own homework
2007-10-21 11:23:34 · answer #9 · answered by Deirdre O 7 · 0⤊ 0⤋
Do your own ******* homework, idiot.
AIM: thebenajim88
2007-10-21 11:25:09 · answer #10 · answered by thebenajim 1 · 0⤊ 0⤋