笔算:①2.608+2.84 ②6.07﹣3.869= ③1.5﹣0.306=④76.8+26.82= ⑤102.07﹣37.257= ⑥48.64+18.6=
(x- 4.5)=7 x-25%x=10
3x=5(32-x) 0.36×5-x=
2(x-2)+2=x+1 3-x=2-5(x-1)
8-x= 3-x=
2x+3x=3.15 3.4x=8.6-1.8