(1)99×101+1
=(100-1)×(100+1)+1
=10000-1+1
=10000;
(2)5032-4972.
=(503+497)(503-497)
=1000×6
=6000.
用乘法公式计算 (1)99×101+1 (2)5032-4972.
用乘法公式计算
(1)99×101+1
(2)5032-4972.
(1)99×101+1
(2)5032-4972.
数学人气:570 ℃时间:2019-10-26 05:52:46
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