六年级数学题将混循环小数化分数,急1、0.215(15循环) 2、6.353(3循环) 3、0.15(5循环) 4、0.91(1循环)
2019-05-05
六年级数学题将混循环小数化分数,急
1、0.215(15循环) 2、6.353(3循环) 3、0.15(5循环) 4、0.91(1循环)
优质解答
0.21515...=(215-2)/990=213/990=71/330
6.35333...=6+0.35333...=6+(353-35)/900=6+318/900=6+79/225
0.1555...=(15-1)/90=7/45
0.91111...=(91-9)/90=41/45
0.21515...=(215-2)/990=213/990=71/330
6.35333...=6+0.35333...=6+(353-35)/900=6+318/900=6+79/225
0.1555...=(15-1)/90=7/45
0.91111...=(91-9)/90=41/45