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.