考點(diǎn):分?jǐn)?shù)的四則混合運(yùn)算,整數(shù)四則混合運(yùn)算,運(yùn)算定律與簡便運(yùn)算,小數(shù)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)(2)(5)運(yùn)用乘法分配律解答.
(3)按照先算括號(hào)里面的加法,再算括號(hào)外面的除法,最后算括號(hào)外面的加法順序計(jì)算解答,
(4)按照先算小括號(hào)里面的,再算中括號(hào)里面的,最后算括號(hào)外面的順序計(jì)算解答,
(6)化24=8×3,再運(yùn)用乘法結(jié)合律解答.
解答:
解:(1)11×
=13×
-2×
=12-1
=10
;
(2)(
-
+
)÷
=
×24-
×24+
×24
=4-3+2
=3;
(3)(
+
)÷
+
=
÷
+
=1+
=1
;
(4)
÷[1÷(
-
)]
=
÷[1÷
]
=
÷
=
;
(5)17.6×16+82.4×16
=(17.6+82.4)×16
=100×16
=1600;
(6)125×24
=(125×8)×3
=1000×3
=3000.
點(diǎn)評(píng):(1)依據(jù)四則運(yùn)算計(jì)算方法正確進(jìn)行計(jì)算,(2)正確運(yùn)用簡便方法解決問題,是本題考查知識(shí)點(diǎn).