(-6)x0.25=-1.5;
(-0.3)×(-9分之100)=-3分之10;
(-4)×12×(0.5)=-24;
(-12.5)×(-7分之6)×(-4)=-7分之300
从-1中减去-4分之3,-3分之2,与-2分之1的和,列式为-1+3/4+2/3+1/2=11/12
如果AB>0,那么丨A+B丨=丨A丨+丨B丨
如果A>0,B<0,则AB
(-6)x0.25=-1.5;
(-0.3)×(-9分之100)=-3分之10;
(-4)×12×(0.5)=-24;
(-12.5)×(-7分之6)×(-4)=-7分之300
从-1中减去-4分之3,-3分之2,与-2分之1的和,列式为-1+3/4+2/3+1/2=11/12
如果AB>0,那么丨A+B丨=丨A丨+丨B丨
如果A>0,B<0,则AB