how do you do this:
4/7 + 3/28=
2007-03-05 15:45:26 · 9 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Convert 4/7 to 28ths
7*4=28
4*4=16
16/28+3/28=19/28
2007-03-05 16:50:06 · answer #1 · answered by someone 2 · 0⤊ 0⤋
you have to make the bottoms equal so you would change both to 28 so to convert 4/7 to ?/28 you would fiqure out what the bottom would be-how many times does 7 go into 28 the answer 4.then multiply the top times 4 and you have 16/28 which you can then add or subtract because the denominators match 16/28 + 3/28= 19/28 or 4/7 when put in lowest terms.
2007-03-05 23:52:28 · answer #2 · answered by cassiepiehoney 6 · 0⤊ 0⤋
ok its simple. FIrst off, the denominator (in this case 7 and 28) you have to change the fractions to were they will have like denominators. SO you think what number can u mulitply 7 by and 28 to get the same number? in this case your lucky. 4x7=28. So you multiply the whole fraction (4/7)x4 which equals 16/28. so 16/28 plus 3/28 equals 19/28. Thats the answer! GOOD LUCK!
2007-03-05 23:59:05 · answer #3 · answered by ~*mU$t@Ng B@sEb@lL*~ 2 · 0⤊ 0⤋
The LCD is 28
4/7 = 16/28
3/28 = 3/28
Add only the numerators
16/28 + 3/28 =
19/28
This does not reduce
2007-03-05 23:48:56 · answer #4 · answered by lizzie 3 · 0⤊ 0⤋
4/7 + 3/28 is the same as 16/28th (i multiplied the top and bottom of 4/7 by 4 to get the same denominator) so
16/28 + 3/28 is 19/28
there u go!
-Kpop Singer
2007-03-05 23:48:09 · answer #5 · answered by kpop_singer 2 · 0⤊ 0⤋
16/28+3/28= 19/28
common denominator.
2007-03-05 23:47:35 · answer #6 · answered by Anonymous · 0⤊ 0⤋
4/7*4/4= 16/28
16/28+3/28=9/28
2007-03-05 23:50:01 · answer #7 · answered by zoee927 3 · 0⤊ 0⤋
1st find common denominator
28
4/7 change to 16/28
add 3/28 you get 19/28.
2007-03-05 23:47:59 · answer #8 · answered by tonysae 2 · 0⤊ 0⤋
4*4/7 * 4 + 3/28
16/28 + 3/28
19/28
2007-03-05 23:52:50 · answer #9 · answered by doctornilam 2 · 0⤊ 0⤋