3,4 - 4,5+ 2,6-11,5 =
5/17 . 31/33+5/17 .2/33
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3 câu trả lời 187
a)
3,4-4,5+2,6-11,5
=-1,1+ + 2,6 - 11,5
= 1,5 - 11,5
= -10
b)
`3,4 - 4,5 + 2,6 - 11,5`
`= (3,4 + 2,6) - (4,5 + 11,5)`
`= 6 - 16`
`= -10`
`---`
`5/17 . 31/33 + 5/17 . 2/33`
`= 5/17 . (31/33 + 2/33)`
`= 5/17 . 33/33`
`= 5/17 . 1`
`= 5/17`
`= (3,4 + 2,6) - (4,5 + 11,5)`
`= 6 - 16`
`= -10`
`---`
`5/17 . 31/33 + 5/17 . 2/33`
`= 5/17 . (31/33 + 2/33)`
`= 5/17 . 33/33`
`= 5/17 . 1`
`= 5/17`
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· 5 tháng trước
<33
`3,4-4,5+2,6-11,5`
`=(3,4+2,6)-(4,5+11,5)`
`=6-16`
`=-10`
----------------
`5/17 * 31/33 + 5/17 * 2/33`
`=5/17 *(31/33+2/33)`
`=5/17 * 33/33`
`=5/17 *1``
`=5/17`
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