解题思路:(1)(2)(3)从左往右依次计算即可求解;
(4)先算小括号里面的加法,再算括号外面的除法;
(5)先算乘除法,再算减法;
(6)先算小括号里面的减法,再算中括号里面的乘法,最后计算括号外面的除法.
(1)1.98÷0.18÷0.11
=11÷0.11
=100
(2)6.25÷0.25×0.6
=25×0.6
=15
(3)7.8÷2.6÷0.3
=3÷0.3
=10
(4)(3.2+0.128)÷0.8
=3.328÷0.8
=4.16
(5)4.3×0.8-2.6÷1.3
=3.44-2
=1.44
(6)0.48÷[(6.1-4.6)×0.8]
=0.48÷[1.5×0.8]
=0.48÷1.2
=0.4
点评:
本题考点: 小数四则混合运算.
考点点评: 考查了小数四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.