1/8 и 3/4 = 1/8 и 6/8,
9/10 и 1/20 = 18/20 и 1/20
2/3 и 7/12 = 8/12 и 7/12
7/15 и 3/5 = 7/15 и 9/15
1/2 и 1/3 = 3/6 и 2/6
2/5 и 3/4 = 8/20 и 15/20
3/16 и 2/3 = 9/48 и 32/48
1/4 и 9/25 = 25/100 и 36/100
7/15 и 5/9 = 21/45 и 25/45
1/6 и 3/10 = 5/30 и 9/30
5/12 и 7/15 = 25/60 и 28/60
7/20 и 7/8 = 14/40 и 35/40
A/17-1=8/17
a/17 - 17/17=8/17
a-17/17=8/17
a-17=8
a=8+17
a=25
6*5+3*4+2*9=30+12+18=60рублей она потратила
1)400:4=100
2)100•3=300(м)ширина забора
3)(400+300)•2=700•2=1400(м) периметр забора , или длина забора