直接写出得数 ÷= ×= ×= ÷= ﹣= ÷6= 0.64×= += += 18﹣= 1÷= 75%÷3=
脱式计算，能简算的要简算（3分×4=12分）。+(-)× ÷9+× 125×25×0.32 4--0.25
口算。3-= -= 6÷= (+)×21313×89= 0.9×99+0.9= 1-+=2.3+ 3.57= 0.5×(2.6-2.4)= 0.25×4÷0.25×4=
42:=x:
x-x=
(2.5-2.5× 0.6)÷0.4
÷
= 
×
= 
×
= 
÷
﹣
= 
÷6= 0.64×
= 
+
=
+
= 18﹣
= 1÷
= 75%÷3=
+(
-
÷9+
×
125×25×0.32 4-
-0.25
= 
-
= 6÷
= (
+
)×21
+
=
=x:
x=
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