考點(diǎn):分?jǐn)?shù)的四則混合運(yùn)算
專題:運(yùn)算順序及法則
分析:(1)根據(jù)乘法分配律進(jìn)行簡(jiǎn)算;
(2)根據(jù)乘法分配律進(jìn)行簡(jiǎn)算;
(3)先算括號(hào)里面的加法,再算除法,最后算括號(hào)外面的加法;
(4)根據(jù)減法的性質(zhì)進(jìn)行簡(jiǎn)算;
(5)根據(jù)乘法分配律進(jìn)行簡(jiǎn)算;
(6)根據(jù)乘法分配律進(jìn)行簡(jiǎn)算.
解答:
解:(1)1.02×99
=1.02×(100-1)
=1.02×100-1.02×1
=102-1.02
=100.98;
(2)
×153-0.6×53
=0.6×153-0.6×53
=0.6×(153-53)
=0.6×100
=60;
(3)(
+
)÷
+
=
÷
+
=
+
=
;
(4)10-
-
+
=10-(
+
)+
=10-1+
=9+
=9
;
(5)88×
=(89-1)×
=89×
-1×
=88-
=87
;
(6)0.32×6.7+3.2×0.33
=0.32×6.7+0.32×3.3
=0.32×(6.7+3.3)
=0.32×10
=3.2.
點(diǎn)評(píng):考查了運(yùn)算定律與簡(jiǎn)便運(yùn)算,四則混合運(yùn)算.注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算定律簡(jiǎn)便計(jì)算.