2/5×( )=2/27×( )=7/10×( )=( )×9/142/5×( )=2/27×( )=7/10×( )=( )×9/14=1.这题的空处要填什么?
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2/5×( )=2/27×( )=7/10×( )=( )×9/142/5×( )=2/27×( )=7/10×( )=( )×9/14=1.这题的空处要填什么?
2/5×( )=2/27×( )=7/10×( )=( )×9/14
2/5×( )=2/27×( )=7/10×( )=( )×9/14=1.这题的空处要填什么?
2/5×( )=2/27×( )=7/10×( )=( )×9/142/5×( )=2/27×( )=7/10×( )=( )×9/14=1.这题的空处要填什么?