问题
解答题
怎样简便就怎样算:
25×36
98×36
24×99+24.
答案
(1)25×36
=25×4×9
=100×9
=900;
(2)98×36
=(100-2)×36
=100×36-2×36
=3600-72
=3528;
(3)24×99+24
=24×(99+1)
=24×100
=2400.
怎样简便就怎样算:
25×36
98×36
24×99+24.
(1)25×36
=25×4×9
=100×9
=900;
(2)98×36
=(100-2)×36
=100×36-2×36
=3600-72
=3528;
(3)24×99+24
=24×(99+1)
=24×100
=2400.