6×(0.1x-2)=1.8 (28-x)×9=5
1%÷0.1-0.1=
99×37+37=
=
10﹣10%=
8×12.5%=
0.3×0.4=
2.95+0.5=
2÷0.25=
①75.6×27﹣170×7.56
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