柳州市燃气公司热线:运用乘法公式计算
来源:百度文库 编辑:中科新闻网 时间:2024/05/23 10:45:28
99.5的平方
要有过程啊
要有过程啊
(100-0.5)^2=10000-100+0.25=9900.25
99.5^2
=(100-0.5)^2
=100^2-2*100*0.5+0.25
=10000-100+0.25
=9900.25
99.5×99.5=9890.25
(100-0.5)^2=10000-100+0.25=9900.25
99.5^2
=(100-0.5)^2
=100^2-2*100*0.5+0.25
=10000-100+0.25
=9900.25
99.5×99.5=9890.25