0.999x1.3-0.111x2.7用简便方法怎么算

2025-04-26 06:28:31
推荐回答(2个)
回答1:

0.999x1.3-0.111x2.7
=0.999x1.3-0.111x(9x0.3)
=0.999x1.3-0.999x0.3
=0.999(1.3-0.3)
=0.999

回答2:

0.999x1.3-0.111x2.7
=(0.999/9)x(9x1.3)-0.111x2.7
=0.111x11.7-0.111x2.7
=0.111x(11.7-2.7)
=0.111x9
=0.999