4(x+0.3)=4.8
1.2x-0.4x=9.6
1.5×8-2x=6
1.25÷0.5= 2.3×0.4= 0.081÷0.9= 1.7×1.99÷1.7=
0.4×2.5= 4.9÷0.07= 2.5×11= 0.03÷15=
6(x-8)=8.4 5x-1.2×0.5=6.6
1.06×7=
8.6÷4=
1.5×0.4=
7.2÷1.2=
4.8×2.5=
0.84÷2.8=
6.2a-3.8a=
1.6+0.7x=19.8 1.6x-0.8=2.4
2.7(x-2)=10.8 4.2x-x=1.28
x+3.8=5.2 2.1÷x=7 4x-14×8=0
4.2x+2.5x=134 2(x+3)=6.8 42-7x= 17.5
6.90.99×6.9 3.99×13.99 12.712.7×1.8
18:15和0.6:0.5 : 和 :2 0.4:0.8和0.5:0.2 16:8和1.2:0.6