解题思路:按照整数、分数、小数的四则混合运算的顺序计算,有括号的,先算括号里面的,没有括号时,先算乘除法,再算加减法,能简算的要简算.
(1)(7.5+2.5)×0.25,
=10×0.25,
=2.5;
(2)710-18×4,
=710-72,
=638;
(3)5.4÷18+12,
=0.3+12,
=12.3;
(4)2÷[8/5]×[25/24],
=[5/4]×[25/24],
=[125/96];
(5)2.25×1.8+12.5×0.18,
=(22.5+12.5)×0.18,
=35×0.18,
=6.3;
(6)[1-([1/2]+
1
3)]×36,
=(1-[5/6])×36,
=[1/6]×36,
=6.
点评:
本题考点: 整数、分数、小数、百分数四则混合运算;运算定律与简便运算;分数的简便计算.
考点点评: 此题考查整数、分数、小数的四则混合运算的计算题,有括号的,先算括号里面的,没有括号时,先算乘除法,再算加减法.