考點(diǎn):小數(shù)四則混合運(yùn)算,運(yùn)算定律與簡便運(yùn)算,分?jǐn)?shù)的四則混合運(yùn)算
專題:運(yùn)算順序及法則,運(yùn)算定律及簡算
分析:(1)根據(jù)減法的性質(zhì)進(jìn)行簡算;
(2)根據(jù)乘法分配律進(jìn)行簡算;
(3)先算小括號(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)乘法分配律進(jìn)行簡算;
(5)按照從左向右的順序進(jìn)行計(jì)算;
(6)先算減法和加法,再算乘法.
解答:
解:(1)4.67-(2.98+0.67)
=4.67-2.98-0.67
=4.67-0.67-2.98
=4-2.98
=1.02;
(2)73.8×16-73.8×6
=73.8×(16-6)
=73.8×10
=738;
(3)(
+
)÷
+
=
÷
+
=
+
=
;
(4)
÷5+
×
=
×
+
×
=(
+
)×
=1×
=
;
(5)
×0.375÷
=
÷
=
;
(6)(
-
)×(
+
)
=
×
=
.
點(diǎn)評:考查了運(yùn)算定律與簡便運(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)算定律簡便計(jì)算.