计算 能用简便方法用简便方法
（1）9.4×[1.28﹣（1.54﹣0.31）]
（2）20﹣[7.8+（6.2+1.29）]
（3）0.25×2.73×4
（4）799×99．
相关试题
=
×4= 
÷
= 
×
×
= 6.9+3.1﹣6.9+3.1=
﹣
= 0.4×2.5=
+3÷8= 
÷4×
÷4= 0.42=
= 
+
= 
﹣
= 
÷7=直接写出得数．
382﹣297= 
+
= 
÷2= 3.8+6.2= 8.1÷3×2=
×33= 68﹣198= 0.65÷1.3= 75×10%= 0.75﹣（0.75+3.4）=
1÷
= 1÷0.01= 
﹣
= 
+
×2= 48×（
﹣
）=
÷12= 
= 
×
= 18×（
+
）=
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