Извини только английский смогла, сейчас найду, вот, держи для начала Autumn - a great time when the nature of trees painted in bright colors, yellow, red, orange! In autumn there is the most beautiful phenomenon - Falling Leaves! Of course, fall not without cloudy weather, no rain, thunderstorms, but it's just more animates nature! When I walk down the street after school, or just went for a walk, I do not want to go home. After all, nature is beautiful autumn! Autumn - my favorite time of year!
а)
20:2=10 -- узнаем, на сколько надо умножить дробь, чтобы получить нужный знаменатель.
1/2=1/2*10/10=10/20
.
20:4=5
3/4=3/4*5/5=15/20
.
20:10=2
7/10=7/10*2/2=14/20
.
80:20=4 - здесь будем делить, т.к. знаменатель больше, чем надо
44/80=44/80 : 4/4=11/20
.
9/15=3/5
20:5=4
3/5*4/4=12/20
б)
36:4=9
1/4=1/4 * 9/9=9/36
.
36:3=12
2/3=2/3 * 12/12=24/36
.
36:6=6
5/6=5/6 * 6/6=30/36
.
36:9=4
7/9=7/9 * 4/4=28/36
.
здесь ошибка, не 11/8, а должно быть 1/18.
36:18=2
1/18=1/18 * 2/2=2/36
.
72:36=2
14/72 : 2/2=7/36
в)
64:4=16
3/4=3/4*16/16=48/64
.
64:8=8
5/8=5/8*8/8=40/64
.
64:16=4
13/16=13/16*4/4=52/64
.
64:32=2
31/32=31/31*2/2=62/64
.
128:64=2
42/128=42/128 : 2/2=21/64
.
256 : 64=4
64/256=64/256 : 4/4=16/64
г)
100:4=25
1/4=1/4*25/25=25/100
.
100:5=20
2/5=2/5*20/20=40/100
.
100:10=10
9/10=9/10*10/10=90/100
.
100:20=5
17/20=17/20*5/5=85/100
.
100:25=4
24/25=24/25*4/4=96/100
.
5/125=1/25
100:25=4
5/125=1/25=1/25*4/4=4/100
Autumn - a great time when the nature of trees painted in bright colors, yellow, red, orange! In autumn there is the most beautiful phenomenon - Falling Leaves! Of course, fall not without cloudy weather, no rain, thunderstorms, but it's just more animates nature! When I walk down the street after school, or just went for a walk, I do not want to go home. After all, nature is beautiful autumn! Autumn - my favorite time of year!