0.4444+22.22*222.22+1777.6*22.222=?(要巧算啦)
问题描述:
0.4444+22.22*222.22+1777.6*22.222=?(要巧算啦)
答
0.4444+22.22*222.22+1777.6*22.222=0.4444+222.2*22.222+1777.6*22.222
=0.4444+(222.2+1777.6)*22.222=0.4444+1999.8*22.222
0.4444应该是0.444440.4444+1999.8*22.222怎么会等于0.44444呢????我有点看不懂诶我是说题目有错,应该是0.44444呃、、、、没有错诶、、、、书上就是这样滴!!!你再好好想想嘛0.4444+22.22*222.22+1777.6*22.222=0.4444+222.2*22.222+1777.6*22.222=0.4444+(222.2+1777.6)*22.222=0.4444+1999.8*22.222=0.4444+2000*22.222-0.2**22.222=0.4444+44444-4.4444=0.4444-4.4444+44444=44444-4=44440