解:(1)33.02-(148.4-90.85)÷2.5,
=33.02-57.55÷2.5,
=33.02-23.02,
=10;
(2)4
×0.6+0.6÷
,
=4
×0.6+0.6×
,
=(4
+
)×0.6,
=
×0.6,
=5.6;
(3)(1÷
+
÷1)÷5.1,
=(
+
)÷5.1,
=
÷5.1,
=
;
(4)218.1+(3
-0.299÷0.23)×1
,
=218.1+(3
-1.3)×1
,
=218.1+1.9×1
,
=218.1+2.85,
=220.95.
分析:(1)先計(jì)算括號(hào)里面的減法,再計(jì)算除法,最后計(jì)算括號(hào)外面的減法;
(2)根據(jù)乘法分配律進(jìn)行簡(jiǎn)算;
(3)先計(jì)算括號(hào)里面的除法,再計(jì)算括號(hào)里面的加法,最后計(jì)算括號(hào)外面的除法;
(4)先計(jì)算括號(hào)里面的除法,再計(jì)算括號(hào)里面的減法,再計(jì)算括號(hào)外面的乘法,最后計(jì)算括號(hào)外面的加法.
點(diǎn)評(píng):先找清運(yùn)算順序,然后再根據(jù)題意進(jìn)一步計(jì)算即可;能簡(jiǎn)算的要簡(jiǎn)算.