Question

求下列各题中a的值a+(-2又1/3)=1又1/3a+(-1.3)=-3又1/2a+(+2又5/12)=-1又23/24

Answer 1

a+(-2又1/3)=1又1/3

a-2又1/3=1又1/3

a=1又1/3+2又1/3=3又2/3

a+(-1.3)=-3又1/2

a=-3又1/2-(-1.3)=-3.5+1.3=-2.2

a+(+2又5/12)=-1又23/24

a=-1又23/24-2又5/12=-(1+23/24)-(2+5/12)=-1-23/24-2-10/24=-3-33/24

=-3-11/8=-4-3/8=-(4+3/8)

=-4又3/8

(-4.5)+a=0

a=-(-4.5)=4.5