4.2-3.8=
24÷0.8=
5.6×0.5=
10.3+2.45=
8.4÷2.1=
2.5×4÷2.5×4=
1.25×32=
0.6×0.1=
1.5a+a=
7.5-0.15=
0.56×0.7+0.56×0.7=
0.22=
8.4÷0.21=
1.5÷0.01=
12.5×8= 50×0.4= 45÷0.9= 2.4÷8×0=
0.12+0.8= 0.42÷0.6= 5a+0.9a= 5+0÷5-5=
?颗