分析:算式(1)(3)(5)及算式(6)中括號(hào)內(nèi)的乘法算式可根據(jù)乘法分配律進(jìn)計(jì)簡(jiǎn)便計(jì)算;
算式(2)可根據(jù)一個(gè)數(shù)減兩個(gè)數(shù)的和等于用這個(gè)數(shù)分別減去這兩個(gè)數(shù)的減法性質(zhì)進(jìn)行計(jì)算;
算式(4)根據(jù)分?jǐn)?shù)加減法的運(yùn)算法則計(jì)算即可.
解答:解:(1)67×156-56×67
=(156-56)×67,
=100×67,
=6700;
(2)84.67-(14.67+15.3)
=84.67-14.67-15.3,
=70-15.3,
=54.7;
(3)(
-)×63++-×63
=
×63-
×63,
=9-7,
=2;
(4)
+
+
-
=
-
,
=
-,
=
;
(5)
×
-
÷=
×
-
×,
=(
+)×
,
=1×
,
=
;
(6)375÷[54×(
-)]]
=375÷[54×
-54×
],
=375÷[45-30],
=375÷15,
=25.
點(diǎn)評(píng):本題考查了學(xué)生運(yùn)用運(yùn)算定律對(duì)四則混合運(yùn)算題目進(jìn)行簡(jiǎn)便計(jì)算的能力.