1)7-6,35=0,65
2)0,65:6,5=0,1
3)0,1+9,9=10
4)1,2÷36=1 2/10 ÷ 36 = 6/5 ÷ 36 = 6/5 × 1/36 = 1/30
5)1,2÷0,25=4,8
6)1/30+4,8=1/30+4 8/10=1/30 + 24/5 = (1 × 1 + 24 × 6)/30 = (1 + 144)/30 = 145/30 = 29/6 = 4 5/6
7)4 5/6 - 1 5/16 = 29/6 - 21/16 = (29 × 8 - 21 × 3)/48 = (232 - 63)/48 = 169/48 = 3 25/48
8)3 25/48 ÷ 169/24 = 169/48 ÷ 169/24 = 169/48 × 24/169 = 1/2=0,5
9)10÷0,5=20
ответ 20