解:(1)10÷8+3.96×12.5%+2.04×
=1.25+3.96×12.5%+2.04×0.125,
=0.125×10+3.96×0.125+2.04×0.125,
=(10+3.96+2.04)×0.125,
=16×0.125,
=2;
(2)6000-105×36
=6000-(100+5)×36,
=6000-100×36-36×5,
=6000-3600-180,
=2220;
(3)85-84
÷7
=85-(84+
)÷7,
=85-84÷7-
7,
=85-12-
,
=72
;
(4)
=
÷[
+
],
=
÷[
+
],
=
×
,
=
;
(5)
=1
×3.6+3.6×7
+3.6,
=(1
+7
+1)×3.6,
=10×3.6,
=36.
分析:(1)據(jù)乘法算式的性質(zhì)將原式變?yōu)?.125×10+3.96×12.5%+2.04×0.125后再據(jù)分配律進(jìn)行簡便運(yùn)算;
(2)根據(jù)分配律將105×36變?yōu)椋?00+5)×36再據(jù)減法性質(zhì)進(jìn)行計算;
(3)可先據(jù)分配律將式中84
÷7拆分為(84+
)÷7再據(jù)減法性質(zhì)進(jìn)行簡便計算;
(4)可將括號中的算式據(jù)分配律進(jìn)行簡便計算;
(5)將據(jù)分配律進(jìn)行簡便計算.
點(diǎn)評:完成此類題目要認(rèn)真分析式中據(jù),根據(jù)式中數(shù)據(jù)的特點(diǎn)及內(nèi)在聯(lián)系選擇合適的方法進(jìn)行簡便計算.