问题 解答题
简便计算:
101×47

125×25×8

99×37
428+257-(157+38)101×101-101.
答案

(1)101×47,

=100×47+1×47,

=4700+47,

=4747;

(2)125×25×8,

=(125×8)×25,

=1000×25,

=25000;

(3)99×37,

=(100-1)×37,

=100-37-1×37,

=3700-37,

=3663;

(4)428+257-(157+38),

=428+(257-157-38),

=428+62,

=490;

(5)101×101-101,

=101×(101-1),

=101×100,

=10100.

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