竖式计算． 270×30= 540×60= 306×28= 267×34=
+++= × = = × = ．
直接写得数．×40===== 18× 8×=×0×==
直接写得数．×0=×=×12=×= 45×= 9×=×=×100= 18×=×=+= 18×=×= 1×=﹣=×21=×=×6=××9=×= 2﹣=
一瓶果汁重千克，20瓶果汁重多少千克？
请在图中表示×．
+
+
= × = ．
×40=
=
=
=
= 18×
=
×0×
=
=
×0=
×
=
×12=
×
= 45×
=
=
×
=
×100= 18×
=
×
=
+
= 18×
=
×
=
﹣
=
×21=
×
=
×6=
×
×9=
×
= 2﹣
=
千克，20瓶果汁重多少千克？
×
．
粤公网安备 44130202000953号