<<<
0.1÷10=
20-19.9=
0.25×40=
0.08+0.2=
6.8÷2=
5.77-8.71×0=
26÷0.13=
8.2×0.4=
0.5×1.25×1.6
7.4×1.5+1.5+1.6×1.5
12.6×4.2÷1.4
(34.7-6.2×2.4)÷1.2(得数保留两位小数)
2x÷0.8=3.4
2.4x+3.6x=15
2.8x+3.4=10.12
3(x-2.8)=16.8