-6*8=-48; -45+35=-10; 15*15=225; -6,3:9=-0,7; -85:17=-5; 23*23=529; 29-89=-60; -3+2=-1; 39:(-13)=-3; -3,8+2,8=-1; 3-2/7=2 5/7; 12*12=144; 1 6/11 - 7/11 = 10/11; 1/3-3=-2 2/3; -6,3:(-0,9)=7; 13*11=143; -1/4-1=-1 1/4; 19*19=361; -3*3,5=-10,5;
63:(-0,9)=-70; 22*22=484; -9+59=50; -1,2*(-5)=6; 1-5/7=2/7; -1:2=-0,5; -6:10=-0,6; 3+3/8=3 3/8; 0,49:0,7=0,7; -0,6:0,1=-6; -1-8=-9; 1-2=-1; -1+8=7; 2 1/2 - 4 = -1 1/2; 1,7*1=1,7; -5:2=-2,5; -9-50=-59; -12+2=-10; 2-12=-10.