直接写出得数．
4÷0.3= 0.5×60%= 2.3﹣0.7= 4.5×0.25=
= 
= 
= 
=
1624÷56= 866﹣398= 292×41≈ 718÷80≈
直接写出得数．
4÷0.3= 0.5×60%= 2.3﹣0.7= 4.5×0.25== = = =
1624÷56= 866﹣398= 292×41≈ 718÷80≈
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