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①7÷ - ÷7
②[1-( + )]×
③ ×6+ ÷
④( + - )×72
⑤( + )×7+
⑥ ÷[( + )× ]
1.2×0.6= 32%+68%= × = 200÷40%=
-30%= 1÷1%= 20%×50%= ( - )×28=
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