3/4. -5/7. 20/-9. -14/15
5,25 + 3 4/9 + 2 1/27 + 4,75 + 3 4/1 + 3/4
3/4. -5/7. 20/-9. -14/15 5,25 + 3 4/9 + 2 1/27 + 4,75 + 3 4/1 + 3/4
By Adeline
By 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`
`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`