直接写得数．+= +0.625= ×= ÷7= 0.28+4.52=9.1÷1.3= 9×÷9×= 3.2÷4= 4÷0.01×0.1= 18÷9=
+++= × = = × = ．
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×．
+
= 
+0.625= 
×
= 
÷7= 0.28+4.52=
÷9×
÷9=
+
+
= × = ．
×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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