算一算。40÷8= 63÷9= 64÷8= 54÷6=
2﹣= += ÷=×0+120= 10.01﹣10.01= 3.14×9=
直接写得数．19×9+19=100﹣2.02=30÷30%=+=×=1÷﹣÷1=+÷+=1+2+3+4+5+6+5+4+3+2+1=
直接写出得数．27+58= 910﹣540= 7.8÷10= 78﹣0.98= =7﹣= = =
直接写出得数．578+216= 18.25﹣3.3= 3.2﹣=×8.1= += ÷3=0.99×9+0.99= ×=
口算．530﹣399= 9.6÷0.6= ÷6= 25+75÷25+75=0.5= = = ×9=
= 
+
= 
÷
×0+120= 10.01﹣10.01= 3.14×9=
+
=
×
=
+
=
= 
= 
=
=
×8.1= 
= 
÷3=
=
÷6= 25+75÷25+75=
= 
= 
= 
×9=
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