用简便方法计算下面各题.20.36-7.98-5.02-4.36

问题描述:

用简便方法计算下面各题.20.36-7.98-5.02-4.36
117.8÷2.3-4.88÷023
9.56×4.18-7.34×4.18-0.26×4.18
还有下面的两道

20.36-7.98-5.02-4.36 = 20.36-4.36 -(7.98+5.02)=16-13=3还有两道117.8÷2.3-4.88÷023 =117.8÷2.3-48.8÷2.3 =(117.8-48.8)÷2.3=69÷2.3=309.56×4.18-7.34×4.18-0.26×4.18=(9.56-7.34-0.26)×4.18=