直接写出得数．12a-7a=13-14=34+16=5-13=127-47=9x+5x-8x=1115-25=0.5+225=

Question

直接写出得数．

12a-7a=	(1)/(3)-(1)/(4)=	(3)/(4)+(1)/(6)=	5-(1)/(3)=
1(2)/(7)-(4)/(7)=	9x+5x-8x=	(11)/(15)-(2)/(5)=	0.5+2(2)/(5)=

Answer 1

12a-7a=5a	(1)/(3)-(1)/(4)=(1)/(12)	(3)/(4)+(1)/(6)=(11)/(12)	5-(1)/(3)=4(2)/(3)
1(2)/(7)-(4)/(7)=(5)/(7)	9x+5x-8x=6x	(11)/(15)-(2)/(5)=(1)/(3)	0.5+2(2)/(5)=2.9