125×9×8=125×8×9运用了乘法结合律． ．
8÷______==2：______=0.4=______%=______成．
5：4=______÷20=______%=
9÷______=75%=______：8==______（填小数）
=______÷______=60%=______：______=______小数．
2.5：______==1.25=25÷______=______%．
=______÷______=60%=______：______=______小数．
=2：______=0.4=______%=______成．
=______（填小数）
=1.25=25÷______=______%．
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