张军家买回一袋大米，平均每天吃2千克，吃了9天后还剩下7千克．这袋大米原有多少千克？
直接写出得数．========
口算．== 5﹣== 0×1= 1÷===
直接写得数．========
直接写得数+=÷7=×=÷=×8= 9÷= 15×=﹣=÷=×=×=÷=
直接写出得数．+=×=÷6=×8=+= 2﹣= 0+=÷= 1÷=﹣=
=
=
=
=
=
=
=
=
=
= 5﹣
=
=
= 1÷
=
=
=
=
=
=
=
=
=
=
=
+
=
÷7=
×
=
÷
=
×8= 9÷
= 15×
=
﹣
=
÷
=
×
=
=
÷
=
+
=
×
=
÷6=
×8=
+
=
= 0+
=
÷
= 1÷
=
﹣
=
粤公网安备 44130202000953号