№ 3. 1 1/9 · 2 1/5 : 7 1/3 = 1/3.
1) 1 1/9 · 2 1/5 = 10/9 · 11/5 = (2·11)/(9·1) = 22/9
2) 22/9 : 7 1/3 = 22/9 : 22/3 = 22/9 · 3/22 = 3/9 = 1/3
ответ: 1/3.
№ 4. 3 2/3 : 7 1/3 · 2/5 = 1/5.
1) 3 2/3 : 7 1/3 = 11/3 : 22/3 = 11/3 · 3/22 = 11/22 = 1/2
2) 1/2 · 2/5 = 1/5
ответ: 1/5.
№ 3. 1 1/9 · 2 1/5 : 7 1/3 = 1/3.
1) 1 1/9 · 2 1/5 = 10/9 · 11/5 = (2·11)/(9·1) = 22/9
2) 22/9 : 7 1/3 = 22/9 : 22/3 = 22/9 · 3/22 = 3/9 = 1/3
ответ: 1/3.
№ 4. 3 2/3 : 7 1/3 · 2/5 = 1/5.
1) 3 2/3 : 7 1/3 = 11/3 : 22/3 = 11/3 · 3/22 = 11/22 = 1/2
2) 1/2 · 2/5 = 1/5
ответ: 1/5.