Вот:
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Пошаговое объяснение:
1/3÷1/9=1/3*9/1=9/3=3
4/9÷8/9=4/9*9/8=1/2
3/5÷1/25=3/5*25/1=15
1/10÷1/10=1/10*10/1=1
1) 3,6+4,75=8,35
Ответ:
1) 5x/6 - x/6 = 1
4x/6 = 1
x = 6/4 = 1,5
2) 3y/8 - y/4 = -1
y/8 = -1
y = -8
3) 9x/60 - x/20 = 1
6x/60 = 1
x = 60/6 = 10
4) x/9 - x/6 = 1/2
-x/18 = 1/2
x = -9