解:(1)1500-450÷18×25
=1500-25×25,
=1500-625,
=875;
(2)7.6×3.8+7.6×5.2+7.6
=(3.8+5.2+1)×7.6,
=10×7.6,
=76;
(3)(
+
)×35+
=
×35+
×35+
,
=25+28+
,
=53
;
(4)22×34×
×
=(22×
)×(34×
),
=10×8,
=80;
(5)19-
+11-
=(19+11)-(
+
),
=30-1,
=29;
(6)
÷[
×(
+
)]
=
÷[
×
],
=
=
.
分析:(1)(6)根據(jù)四則混合運(yùn)算的運(yùn)算順序計(jì)算即可:先算乘除,再算加減,有括號(hào)的要先算括號(hào)里面的;
(2)(3)可根據(jù)乘法分配律計(jì)算;
(4)可根據(jù)乘法交換律及交換律計(jì)算即可;
(5)可根據(jù)加法交換律及一個(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)計(jì)算.
點(diǎn)評(píng):完成本題要注意分析式中數(shù)據(jù)的特點(diǎn)及內(nèi)在聯(lián)系,然后運(yùn)用合適的方法計(jì)算.