从甲地到乙地，甲车行完全程要6小时，乙车速度与甲车速度的比是4：5，乙车每小时行50千米，从甲地到乙地全程多少千米？
把3米长的木料锯成相等的小段，一共锯了4次，每小段是这根木料的几分之几？每小段长几分之几米？
直接写出计算结果．×= ÷2= 12×= 3÷= ﹣×=÷= ×14= 1﹣×= 6×÷= ÷=
口算．×3= 0÷= 0.5+= ×=8+= ÷= 2﹣﹣= 16.5+4.7=÷3÷= 5.6×=
直接写出得数：×= 15÷1%= 0.52= 3.14×6=0.25×8= ÷= 0.375×= ×3÷×3=
21÷ ÷ 24÷．
×
= 
÷2= 12×
= 3÷
= 
﹣
×
=
÷
= 
×14= 1﹣
×
= 6×
= 
÷
=
×3= 0÷
= 0.5+
= 
×
=
= 
÷
= 2﹣
﹣
= 16.5+4.7=
÷3÷
=
×
= 15÷1%= 0.52= 3.14×6=
÷
= 0.375×
= 
×3÷
21÷
÷
24÷
．
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