Выполни действия: 1 7/8÷4 1/6,6 2/3÷2/79,5 1/3÷3 5/9

1 7/8 ÷ 4 1/6=15/8÷25/6=15/8×6/25= 15×6/8×25=90/200=9/20
6 2/3 ÷ 2/79= 20/3÷2/79= 20/3×79/3= 1580/9 = 175 5/9
5 1/3 ÷ 3 5/9= 16/3÷32/9= 16/3×9/32 = 144/96 = 3/2 = 1,5