能简算的要简算.
40-(7.7+4.8÷1.2)
÷14+×???????????????????????
4.25+0.6+5.75+?????????????????????????
16.5-÷-?????????????????????????????????????????
?×[(+)÷].
网友回答
解:(1)40-(7.7+4.8÷1.2)
=40-(7.7+4)
=40-11.7
=28.3;
(2)÷14+×
=×+×
=()×
=;
(3)4.25+0.6+5.75+
=(4.25+5.75)+(0.6+0.4)
=10+1
=11;
(4)16.5-÷-
=16.5-×-
=16.5-(+)
=16.5-1
=15.5;
(5)×[(+)÷]
=×(+)×
=×(+)
=×
=.
解析分析:(1)按照四则混合运算顺序进行计算;(2)把原式变形,再用乘法的分配律计算;(3)利用加法的交换和结合律进行计算;(4)、(5)直接按照小数的四则混合运算进行计算即可得到