解:(1)23-
-
=23-(
+
),
=23-1,
=22;
(2)44×(
-
)
=44×
-44×
,
=20-11,
=9;
(3)7.5×46.7+52.3×7.5+7.5
=(46.7+52.3+1)×7.5,
=100×7.5,
=750;
(4)6×
+13÷4-19×0.25
=6×
+13×
-19×
,
=(6+13-19)×
,
=0×
,
=0;
(5)[
-(
-
)]÷4
=[
-
]÷4,
=[1-
]÷4,
=
,
=
.
分析:算式(1)可根據(jù)一個(gè)數(shù)減兩個(gè)數(shù)等于減去這兩個(gè)數(shù)的和的減法性質(zhì)進(jìn)行計(jì)算.
算式(2)、(3)、(4)可據(jù)乘法分配律進(jìn)行簡(jiǎn)便計(jì)算;
算式(5)中括號(hào)里的算式可據(jù)一個(gè)數(shù)減兩個(gè)數(shù)的差等于用這個(gè)數(shù)減去兩個(gè)數(shù)中的被減數(shù)加上減數(shù)的減法性質(zhì)及交換律進(jìn)行簡(jiǎn)算.
點(diǎn)評(píng):完成此類(lèi)問(wèn)題要認(rèn)真分析式中數(shù)據(jù)的特點(diǎn)及內(nèi)在聯(lián)系,然后利用合適的簡(jiǎn)算方法進(jìn)行簡(jiǎn)算.