问题 解答题
简便计算:
8×72×125
102×36
49×99+492485-(760+1485)
198÷2×45+45.
答案

(1)8×72×125,

=8×125×72,

=1000×72,

=72000;

(2)102×36,

=(100+2)×36,

=100×36+2×36,

=3600+72,

=3672;

(3)49×99+49,

=(99+1)×49,

=100×49,

=4900;

(4)2485-(760+1485),

=2485-1485-760,

=1000-760,

=240;

(5)198÷2×45+45,

=99×45+45,

=(99+1)×45,

=100×45,

=4500.

判断题
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