脱式计算.
9.5+4.85-6.1375.8-(15.3-4.8)75+360÷20-5(240+60÷5)×3.
网友回答
解:(1)9.5+4.85-6.13,
=14.35-6.13,
=8.22;
(2)75.8-(15.3-4.8),
=75.8-10.5,
=65.3;
(3)75+360÷20-5,
=75+18-5,
=93-5,
=88;
(4)(240+60÷5)×3,
=(240+12)×3,
=252×3,
=756.
解析分析:(1)按照从左到右的顺序计算;
(2)先算小括号里面的减法,再算括号外的减法;
(3)先算除法,再算加法,最后算减法;
(4)先算小括号里面的除法,再算小括号里面的加法,最后算括号外的乘法.
点评:本题蛀牙考查了小数的四则混合运算,找清楚计算的顺序,然后根据运算顺序逐步求解即可.