问题 填空题

(1)45.7-29.25-0.75=______.

(2)2.25×2.25×32=______.

答案

(1)45.7-29.25-0.75,

=45.7-(29.25+0.75),

=45.7-30,

=15.7;

(2)2.25×2.25×32,

=2.25×2.25×4×4×2,

=2.25×4×(2.25×4)×2,

=9×9×2,

=81×2,

=162.

故答案为:15.7,162.

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