直接写得数：0.002×100= 8÷100= 0÷100+72= 25×19×4=0.83﹣0.23= 4.8+0.12= 5﹣2.7= 3.6+7.65+6.4=
+++= × = = × = ．
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？
×
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