3/4. -5/7. 20/-9. -14/15 5,25 + 3 4/9 + 2 1/27 + 4,75 + 3 4/1 + 3/4 03/07/2021 Bởi Adeline 3/4. -5/7. 20/-9. -14/15 5,25 + 3 4/9 + 2 1/27 + 4,75 + 3 4/1 + 3/4
vĐáp án: Giải thích các bước giải: a, `3/4`.`-5/7`.`20/-9`.`-14/15` =(`3/4`.`20/-9`).(`-5/7`.`-14/15`) =`-5/3` .` 2/3` =`-10/9` b,5,25 + 3` 4/9 `+ 2 `1/27` + 4,75 + 3 `1/4` + `3/4` =(5,25+4,75)+(3`1/4`+`3/4`)+(3`4/9`+2`1/27`) =10+4+`148/27` =14+`148/27` =`526/27` Bình luận
`3/4 . (-5/7) . (20/-9) . (-14/15)` `= -15/28 . (20/-9) . (-14/5)` `= 25/21 . (-14/5)` `=-10/9` `5,25 + 3 4/9 + 2 1/27 + 4,75 + 3 1/4 + 3/4` `=( 5,25 + 4,75) + 31/9 +55/27 + 13/4 + 3/4` `= 10 + ( 13/4 + 3/4) + ( 31/9 + 55/27)` `= 10 + 4 + 148/27` `= 14 + 148/27` `= 526/27` Bình luận
vĐáp án:
Giải thích các bước giải:
a, `3/4`.`-5/7`.`20/-9`.`-14/15`
=(`3/4`.`20/-9`).(`-5/7`.`-14/15`)
=`-5/3` .` 2/3`
=`-10/9`
b,5,25 + 3` 4/9 `+ 2 `1/27` + 4,75 + 3 `1/4` + `3/4`
=(5,25+4,75)+(3`1/4`+`3/4`)+(3`4/9`+2`1/27`)
=10+4+`148/27`
=14+`148/27`
=`526/27`
`3/4 . (-5/7) . (20/-9) . (-14/15)`
`= -15/28 . (20/-9) . (-14/5)`
`= 25/21 . (-14/5)`
`=-10/9`
`5,25 + 3 4/9 + 2 1/27 + 4,75 + 3 1/4 + 3/4`
`=( 5,25 + 4,75) + 31/9 +55/27 + 13/4 + 3/4`
`= 10 + ( 13/4 + 3/4) + ( 31/9 + 55/27)`
`= 10 + 4 + 148/27`
`= 14 + 148/27`
`= 526/27`