Question

Помогите решить подробно примеры
1)9/10×10/9=
2)7/14×2ц=
3)1ц 1/2×4/9=
4)2ц 1/2×1ц 3/5=

Answer 1

1) 9/10 * 10/9 = 90/90 = 1
2) 7/14 * 2 = 7/14 * 2/1 = 14/14 = 1
3) 1 1/2 * 4/9 = 3/2 * 4/9 = 12/18 = 2/3
4) 2 1/2 * 1 3/5 = 5/2 * 8/5 = 40/10 = 4