解题思路:(1)(2)从左往右依次计算.
(3)先算括号内的加法,然后从左往右依次计算.
(4)括号内从左往右依次计算,再算括号外的减法.
(1)32.84+52+27.54
=84.84+27.54
=112.38
(2)27.8+8.56-7.268+0.732
=36.36-7.268+0.732
=29.092+0.732
=29.824
(3)31.6-(5.08+7.13)-5.08
=31.6-12.21-5.08
=19.39-5.08
=14.31
(4)40-(3.5-2.85+1.86)
=40-(0.65+1.86)
=40-2.51
=37.49
点评:
本题考点: 小数四则混合运算.
考点点评: 此题考查了小数的四则混合运算,注意运算顺序和运算法则.