口算
80×0= 43×200= 720﹣280= 1050+150=
13×70= 960÷30= 700÷10= 14×7=
26×30= 490÷70= 750÷30= 59×20=
139+408+61= 728﹣365﹣35= 360÷5÷2= 25×32=
口算
80×0= 43×200= 720﹣280= 1050+150=
13×70= 960÷30= 700÷10= 14×7=
26×30= 490÷70= 750÷30= 59×20=
139+408+61= 728﹣365﹣35= 360÷5÷2= 25×32=
×
=
×
=
÷3= 16×
=
+
=
×
÷
=
×
÷
÷
= 5÷
﹣5÷
=
×
=
÷4=
×
=
×7+
×3÷
×
÷10
÷
×14×
÷
÷
÷
×3．
=，
+
=，
﹣
=，
÷
= 
=，
×6=，
×
=，1÷10%= 
÷4=，
×12×
= ．
×
=
÷
= 1.25×8= 1﹣
+
=
+
= 75×10%=
= 9﹣0.9=
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