口算下面各题．
| 60×90= |
70×80= |
23×30= |
22×40= |
| 300×20= |
50×150= |
31×50= |
40×25= |
| 50×60= |
600×20= |
60×120= |
35×20= |
口算下面各题．
| 60×90= |
70×80= |
23×30= |
22×40= |
| 300×20= |
50×150= |
31×50= |
40×25= |
| 50×60= |
600×20= |
60×120= |
35×20= |
×12=
=
=
=
÷7= 1÷
= 12÷
=
+3÷
=
÷3= 6×
=
+
= 30÷
=
×0= 14×
=
÷
= 1÷
=
=
=
= 25×（5+
）=
=
×
÷
= 25%×4=
÷7=
×
×15=
×
= 3000×40%=
×
=
÷
=
×
=
=
÷3=
+
=
﹣
=
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