①15.7-6.2-3.8
②75×0.25+25×
③
④
1.47+5.3=
0×99=
9.9÷11=
0.3×3.6=
1÷0.5=
2.8÷1.4×0.2=
-0.375=
5-=
0.32÷10%=
①63.7﹣5.8﹣4.2
②×+÷11
③(++)×24
④5.96×[1÷(2.1﹣2.09)]
0.32×4.5+5.5×0.32 15.7×40×2.5
9.26+1.2÷(3-2.6) 7÷11+×4
x
5
12
y
30
a