题目内容

简便运算.
25×125×32 75×2.5+25×3.6 72×(
3
8
+
2
9
5
16
×
3
8
×16×8.
(1)25×125×32,
=25×125×8×4,
=(25×4)×(125×8),
=100×1000,
=100000;

(2)75×2.5+25×3.6,
=75×2.5+2.5×36,
=(75+36)×2.5,
=111×2.5,
=277.5;

(3)72×(
3
8
+
2
9
),
=72×
3
8
+72×
2
9

=27+16,
=43;

(4)
5
16
×
3
8
×16×8,
=(
5
16
×16)×(
3
8
×8),
=5×3,
=15.
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