ответ: 1) 29/40, 2) 2 1/3.
1)
3 5/8 ÷5 = 5 + 3·8/
8 ÷5 = 29/
8 ÷5 = 29 / 8·5 = 29/
40 = 0.725
2)
2 2 /3 ÷1 1/
7 = 2 + 2·3
/3 ÷ 1 + 1·7
/7 = 8 /3 ÷ 8 /7 = 8 /3 × 7 /8 = 8·7 / 3·8 = 56 /24 = 7 · 8 / 3 · 8 = 7 /3 = 2·3 + 1 /3 = 2 1 /3 ≈ 2.(3)
