180+90=
25×0.7×4=
2﹣2÷3=
( ﹣0.375)×5=
32÷53×0=
0.77+0.33=
(0.18+0.9)÷9=
2× ÷2× =
5.2﹣4=
13÷2÷13=
7÷1.4=
1.68+1.5=
( + )×8=
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