99.5*100.5
=(100-0.5)(100+0.5)
=100^2-0.5^2
=10000-0.25
=9999.75
简便运算:99.5×100.5
0
0
4个回答
-
00
更多回答
99.5*100.5
=(100-0.5)(100+0.5)
=100^2-0.5^2
=10000-0.25
=9999.75