1.а)2,81*12,1-(-4,8)*2,81;
1)2,81*12,1=34,001;
2)2,81-(-4,8)=-13,488;
3)34,001-(-13,488)=47,489.
б)(-33/35:6/7+7/36:(-5/6)*1,2;
1)-33/35:6/7=-33/35*7/6=-11/10;
2)7/36:(-5/6)=7/36*(-6/5)=-7/30;
3)-11/10-7/30=-40/30=4/3;
1,2=1ц.2/10=6/5.
4)4/3*6/5=8/5=1ц.3/5.
2.-6,7-х=-4,3;
-х=-4,3+6,7;
-х=2,4;
х=-2,4.
9/44*з=-2ц 5/11.
-2ц.5/12=-27/11.
х=-27/11:44/9;
х=3*4;
х=12.