数学高手请进!
问一下哦:
课本上有一题,说:
怎样算简便就怎样计算
1.9-1.9*(1.9-1.9)
[1-(0.5-0.25)]*0.6
(注明:“*”是乘号)
参考答案:1.9-1.9*(1.9-1.9) =1.9
[1-(0.5-0.25)]*0.6 =0.75*0.6=0.045
问一下哦:
课本上有一题,说:
怎样算简便就怎样计算
1.9-1.9*(1.9-1.9)
[1-(0.5-0.25)]*0.6
(注明:“*”是乘号)
参考答案:1.9-1.9*(1.9-1.9) =1.9
[1-(0.5-0.25)]*0.6 =0.75*0.6=0.045