1) 3/6 и 1/6
2) 1/9 и 3/9
3) 3/12 и 4/12
4) 15/20 и 16/20
5) 5/8 и 6/8
6 7/12 и 10/12
1) 0
2) (a-2b+3c)-3a+2b-c=-2a+2c
3)(2x+y-3)-y+3-x=1x
4)(a2-2ab2-3x)-a2+2ab-3x2=-2ab2-3x+2ab-3x2
5)(7-12ab+ab2)-14ab+ab2+7=-26ab+2ab2
1,2 * 5/6 - 0,18 : 12/7 = 1 - 0,105 = 0,895