分析:(1)利用乘法分配律計(jì)算簡便;
(2)連除變成除以括號(hào)里這兩個(gè)數(shù)的積,87.5÷12.5÷8=87.5÷(12.5×8);
(3)利用乘法分配律計(jì)算簡便;
(4)利用乘法分配律計(jì)算簡便;
(5)把101變成100+1,再利用乘法分配律計(jì)算簡便;
(6)把14.6-3.625-6.375變成14.6-(3.625+6.375)計(jì)算簡便.
解答:解:(1)24×
+76×
,
=
×(76+24),
=
×100,
=50;
(2)87.5÷12.5÷8,
=87.5÷(12.5×8),
=87.5÷100,
=0.875;
(3(
+
)÷
,
=
×8+
×8,
=7+6,
=13;
(4)91+91×(
-
),
=91+91×
-91×
,
=91+14-13,
=92;
(5)2.2×101,
=2.2×(100+1),
=2.2×100+2.2×1,
=220+2.2,
=222.2;
(6)14.6-3.625-6.375,
=14.6-(3.625+6.375),
=14.6-10,
=4.6.
點(diǎn)評(píng):考查了運(yùn)算定律與簡便運(yùn)算,四則混合運(yùn)算.注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算律簡便計(jì)算.