<span>3/5 и 5/6
18/30 и 25/30
6/11 и 4/9
54/99 и 44/99
5/6 и 4/11
55/66 и 24/66
7/18 и 1/6
7/18 и 3/18
9/13 и 4/5
45/65 и 52/65
5/7 и 3/4
20/28 и 21/28</span>
а) 382 = 300 + 80 + 2 = 3 * 10² + 8 * 10¹ + 2 * 10⁰
б) 95 407 = 90 000 + 5 000 + 400 + 7 = 9 * 10⁴ + 5 * 10³ + 4 * 10² + 0 * 10¹ + 7 * 10⁰
в) 1 203 450 = 1 000 000 + 200 000 + 3 000 + 400 + 50 = 1 * 10⁶ + 2 * 10⁵ + 0 * 10⁴ + 3 * 10³ + 4 * 10² + 5 * 10¹ + 0 * 10⁰
15*(2х+11)=285
30х+165=285
30х=120
х=4