问题
填空题
2012=______,48×52=______.
答案
2012=(200+1)2,
=40000+400+1,
=40401;
48×52,
=(50-2)(50+2),
=2500-4,
=2496.
2012=______,48×52=______.
2012=(200+1)2,
=40000+400+1,
=40401;
48×52,
=(50-2)(50+2),
=2500-4,
=2496.