1, 4-7/5-8/3 2, -1+1/3-1/9-1/81 3, 4/5 -(-2/7)-7/10 4, 3/4-[3/4-(16/18+15/18)] Giúp với mình cảm ơn 06/08/2021 Bởi Iris 1, 4-7/5-8/3 2, -1+1/3-1/9-1/81 3, 4/5 -(-2/7)-7/10 4, 3/4-[3/4-(16/18+15/18)] Giúp với mình cảm ơn
`4 – 7/5 – 8/3` `= 60/15 – 21/15 – 40/15` `= -1/15` `-1 + 1/3 – 1/9 – 1/81` `= -81/81 + 27/81 – 9/81 – 1/81` `= 98/81` `4/5 – (-2/7) – 7/10` `= 4/5 + 2/7 – 7/10` `= 56/70 + 20/70 – 49/70` `= 27/70` `3/4 – [3/4- ( 16/18 + 15/18 )]` `= 3/4 – [ 3/4- 31/18 ]` `= 3/4 – 3/4 + 31/18` `= 31/18` Bình luận
`4 – 7/5 – 8/3`
`= 60/15 – 21/15 – 40/15`
`= -1/15`
`-1 + 1/3 – 1/9 – 1/81`
`= -81/81 + 27/81 – 9/81 – 1/81`
`= 98/81`
`4/5 – (-2/7) – 7/10`
`= 4/5 + 2/7 – 7/10`
`= 56/70 + 20/70 – 49/70`
`= 27/70`
`3/4 – [3/4- ( 16/18 + 15/18 )]`
`= 3/4 – [ 3/4- 31/18 ]`
`= 3/4 – 3/4 + 31/18`
`= 31/18`
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