这道计算题怎么做
答案:6 悬赏:70 手机版
解决时间 2021-07-31 11:17
- 提问者网友：活着好累
- 2021-07-30 22:28
(-5)x(-79/9)-(-7)x(+79/9)+12 /(-79/9)
看着有点抽象，
读作：（负５）乘（负９分之７９）减（负７）乘（正９分之７９）加１２除以（负９分之７９
最佳答案
- 五星知识达人网友：像个废品
- 2021-07-30 23:25
先有负号的化为正数
(-5)x(-79/9)-(-7)x(+79/9)+12 /(-79/9)
=5x（79/9）+7x（79/9）-12x（9/79）
（5+7）x（79/9）-12x（9/79）
=12x{（79/9）-（9/79）}
=12x{（79*79+9*9）/711}
=24640 /237
全部回答
- 1楼网友：人间朝暮
- 2021-07-31 04:35
原式=5*(79/9)+7*(79/9)+12/(79/9)=(5+7)*(79/9)+12/(79/9)=12*(79/9)+12/(79/9)=12*[79/9+9/79]=12*(79*79+9*9)/79*9=25288/237
- 2楼网友：你哪知我潦倒为你
- 2021-07-31 03:50
(-5)x(-79/9)-(-7)x(+79/9)+12 /(-79/9) =5x(79/9)+7x(+79/9)-12 /(79/9)
=（5+7）*（79/9）-12*(9/79)
=12*(79/9)-108/79
=316/3 - 108/79
=这个如果你没有抄错题目的话最后通分一下自己算吧 我怀疑你抄错题目了 可能没有这么麻烦
- 3楼网友：时间的尘埃
- 2021-07-31 03:06
小样，出这么变态的题啊？＝103.9662447
- 4楼网友：梦中风几里
- 2021-07-31 02:03
(-5)x(-79/9)-(-7)x(+79/9)+12 /(-79/9)=（5+7-12）*79/9=0
- 5楼网友：神鬼未生
- 2021-07-31 00:35
=5x(79/9)+7x(79/9)-108/79
=12x(79/9)-108/79
=316/3-108/79
=24964/237-324/237
=24640/237
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