口算我最棒．
27+40= 25+30= 42+56= 40+60=
52﹣9= 60﹣30= 57+8= 80﹣40=
13﹣6= 22+27= 78﹣36= 3+18=
100﹣40= 28﹣20= 40﹣1=
口算我最棒．
27+40= 25+30= 42+56= 40+60=
52﹣9= 60﹣30= 57+8= 80﹣40=
13﹣6= 22+27= 78﹣36= 3+18=
100﹣40= 28﹣20= 40﹣1=
= 0.23=
=
=
=
= 45÷25÷4=
×4÷
= 1÷0.125﹣8=
×
÷
= 10×
=
﹣
=
×
=
÷1+
×
=（
）×6= 6.5×4×
=
×54．
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