6.84÷1.086.84 1.4×0.860.86 3.9×0.253.9÷4
1.6×0.6=
3.6×2.5=
4.2÷0.01=
4.6x-0.8x=
1.28÷4=
2.8÷0.8=
6.4×1.5=
2.7a+1.5a=
⑴9.6-5.98÷4.6×6.4 ⑵ 0.137×5.8+1.37×0.32+0.137
⑶1.08× (5.2+2.99÷2.3) ⑷9.27÷0.125÷80
⑴4.8x-6.24=3.6 ⑵3.5(x+1.8)=11.9