K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Các câu hỏi dưới đây có thể giống với câu hỏi trên
PT
0
TT
1
S
5 tháng 3 2023
Câu a :
\(\dfrac{5}{12}+\dfrac{3}{4}+\dfrac{1}{3}\\ =\dfrac{5}{12}+\dfrac{9}{12}+\dfrac{4}{12}=\dfrac{3}{2}\)
câu b :
\(\dfrac{1}{4}+\dfrac{3}{7}+\dfrac{11}{14}\\ =\dfrac{7}{28}+\dfrac{12}{28}+\dfrac{22}{28}=\dfrac{41}{28}\)
câu c :
\(\dfrac{1}{4}+\dfrac{3}{12}+\dfrac{12}{36}\\ =\dfrac{3}{12}+\dfrac{3}{12}+\dfrac{4}{12}\\ =\dfrac{10}{12}=\dfrac{5}{6}\)
H
3 tháng 3 2023
`4/7+4`
`=4/7+4/1`
`=4/7+28/7`
`=32/7`
__
`3+6/11`
`=33/11+6/11`
`=39/11`
__
`3-5/7`
`=3/1-5/7`
`=21/7-5/7`
`=16/7`
__
`21/9-2`
`=21/9-18/9`
`=3/9`
`=1/3`
__
`15/24+2`
`=15/24+48/24`
`=63/24`
`=21/16`
__
`63/45-20/25`
`=63/45-4/5`
`=63/45-36/45`
`=27/45`
`=9/15`
__
`3/4-2/8`
`=3/4-1/4`
`=2/4`
__
`6/7-5/8`
`=48/56-35/56`
`=13/56`
__
`37/45-5/9`
`=37/45-25/45`
`=12/45`
`=4/15`
__
`46/39-11/13`
`=46/39-33/39`
`=13/39`
`=1/2`
__
`5/12+3/4+1/3`
`=5/12+9/12+4/12`
`=14/12+4/12`
`=18/12`
`=3/2`
__
`1/2+3/7+11/14`
`=7/14+6/14+11/14`
`=13/14+11/14`
`=24/14`
`=12/7`
__
`7/10-(1/5+1/4)`
`=7/10-(4/20+5/20)`
`=7/10-9/20`
`=14/20-9/20`
`=5/20`
`=1/4`
__
`15/4-2/3-3/4`
`=(15/4-3/4)-2/3`
`=12/4-2/3`
`=3-2/3`
`=9/3-2/3`
`=7/3`
22 tháng 2 2016
5/9 + 2/3 + 1/2 = 31/18
5/12 + 3/4 + 1/3 = 3/2
1/4 + 3/7 + 11/14 = 41/28
H9
HT.Phong (9A5)
CTVHS
18 tháng 3 2023
\(\dfrac{5}{6}-\dfrac{1}{2}\times\dfrac{3}{4}\)
\(=\dfrac{5}{6}-\dfrac{3}{8}\)
\(=\dfrac{20}{24}-\dfrac{9}{24}\)
\(=\dfrac{11}{24}\)
L
1
H9
HT.Phong (9A5)
CTVHS
18 tháng 3 2023
\(\dfrac{5}{6}+\dfrac{1}{2}:\dfrac{3}{4}\)
\(=\dfrac{5}{6}+\dfrac{1}{2}\times\dfrac{4}{3}\)
\(=\dfrac{5}{6}+\dfrac{2}{3}\)
\(=\dfrac{5}{6}+\dfrac{4}{6}\)
\(=\dfrac{9}{6}=\dfrac{3}{2}\)
10 tháng 3 2022
a: =4/5-3/8+2/8
=4/5-1/8
=32/40-5/40=27/40
b: =5/9+6/9-1/2
=11/9-1/2
=22/18-9/18=13/18
c: =5/12+9/12+4/12=18/12=3/2
d: =7/28+12/28+22/28=41/28
24 tháng 5 2022
1.\(\dfrac{8}{11}+\dfrac{8}{33}\times\dfrac{3}{4}=\dfrac{8}{11}+\dfrac{8\times3}{33\times4}=\dfrac{8\times12}{11\times12}+\dfrac{8\times3}{33\times4}=\dfrac{8\times15}{132}=\dfrac{120}{132}=\dfrac{10}{11}\)
2.\(\dfrac{7}{9}\times\dfrac{3}{14}:\dfrac{5}{8}=\dfrac{7}{9}\times\dfrac{3}{14}\times\dfrac{8}{5}=\dfrac{4}{15}\)
3.\(\dfrac{5}{12}-\dfrac{7}{32}:\dfrac{21}{16}=\dfrac{5}{12}-\dfrac{7}{32}\times\dfrac{16}{21}=\dfrac{5}{12}-\dfrac{1}{6}=\dfrac{5-2}{12}=\dfrac{3}{12}=\dfrac{1}{4}\)
`@V.Tr.V`
\(\frac{5}{12}+\frac{3}{4}+\frac{1}{3}\)
\(=\frac{5}{12}+\frac{9}{12}+\frac{4}{12}\)
\(=\frac{5+9+4}{12}\)
\(=\frac{18}{12}=\frac{9}{4}\)
\(\frac{1}{4}+\frac{3}{7}+\frac{11}{14}\)
\(=\frac{7}{28}+\frac{12}{28}+\frac{22}{28}\)
\(=\frac{7+12+22}{28}\)
\(=\frac{41}{28}\)
\(\frac{5}{12}\)+\(\frac{3}{4}\)+\(\frac{1}{3}\)=\(\frac{5}{12}\)+\(\frac{9}{12}\)+\(\frac{4}{12}\)=\(\frac{18}{12}\)=\(\frac{3}{2}\)
\(\frac{1}{4}\)+\(\frac{3}{7}\)+\(\frac{11}{14}\)=\(\frac{7+12+22}{28}\)=\(\frac{41}{28}\)