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3()3()3()3()3=1填上符号,使等式成立3()3()3()3()3=53()3()3()3()3=203()3()3()3()3=10填上符号,使等式成立

题目详情
3( )3( )3()3( )3=1 填上符号,使等式成立
3( )3( )3()3( )3=5 3( )3( )3()3( )3=20 3( )3( )3()3( )3=10填上符号,使等式成立
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答案和解析
3(- )3( ÷)3(-)3(÷ )3=1