三筐苹果共重140千克，甲筐苹果和乙筐苹果重量之比是3：4，乙筐苹果和丙筐苹果重量之比是6：7，三筐苹果各重多少？
直接写得数﹣= 1÷= 7×= 3÷=÷4=+=××8= 0÷=
直接写得数：+= 1﹣=×=+25%=÷8= 4×25%= 0.36÷36%= 1﹣20%﹣=
直接写得数 3÷=×=÷﹣=÷0.5= 2﹣=（1﹣）÷=
计算．====×26= 12÷=×=÷=
直接写出的数．====%======
﹣
= 1÷
= 7×
= 3÷
=
÷4=
+
=
×
×8= 0÷
=
+
= 1﹣
=
×
=
÷8= 4×25%= 0.36÷36%= 1﹣20%﹣
=
=
×
=
÷
÷0.5= 2﹣
=（1﹣
）÷
=
=
=
=
×26= 12÷
=
×
=
÷
=
=
=
=
=
%=
=
=
=
=
=
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