弹簧伸长的长度与所挂物品的质量是 关系．
直接写出得数．÷12=÷= 1÷= 84×÷84×=×= 2.1÷== 0÷+=
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=
÷12=
÷
= 1÷
= 84×
÷84×
=
×
= 2.1÷
=
= 0÷
+
=
×
=
÷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÷
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