Question

2道有理数除法题1.已知A的相反数是1又3分之2,B的相反数是负2又2分之1,求A减2B分之A+3B的值2.已知A,B互

Answer 1

1.A=5/3 B=-5/2

A-2B=20/3 A+3B=-35/6

-7/8

2.3A+3B-CD=3(A+B)-CD=0-1=-1