Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
f, \(\dfrac{165}{270}\) = \(\dfrac{165:15}{270:15}\) = \(\dfrac{11}{18}\) = \(\dfrac{11\times6}{18\times6}\) = \(\dfrac{66}{108}\)
\(\dfrac{91}{156}\) = \(\dfrac{91:13}{156:13}\) = \(\dfrac{7}{12}\) = \(\dfrac{7\times9}{12\times9}\) = \(\dfrac{63}{108}\)
\(\dfrac{210}{1134}\) = \(\dfrac{210:42}{1134:42}\) = \(\dfrac{5}{27}\) = \(\dfrac{5\times4}{27\times4}\) = \(\dfrac{20}{108}\)
g, \(\dfrac{21}{9}\) = \(\dfrac{21:3}{9:3}\) = \(\dfrac{7}{3}\) = \(\dfrac{7\times10}{3\times10}\) = \(\dfrac{70}{30}\)
\(\dfrac{120}{50}\) = \(\dfrac{120:10}{50:10}\) = \(\dfrac{12}{5}\) = \(\dfrac{12\times6}{5\times6}\) = \(\dfrac{72}{30}\)
\(\dfrac{63}{54}\) = \(\dfrac{63:9}{54:9}\) = \(\dfrac{7}{6}\) = \(\dfrac{7\times5}{6\times5}\) = \(\dfrac{35}{30}\)
a: 12/21=4/7=8/14
4/56=1/14
b: 12/15=4/5=24/30
6/36=1/6=5/30
15/50=3/10=9/30
c: 63/77=9/11=81/99
60/108=5/9=55/99
-18/27=-2/3=-66/99
d: -26/-156=1/6=7/42
49/-14=-7/2=-147/42
32/112=2/7=12/42
\(\frac{-51}{136};\frac{-60}{108};\frac{26}{-156}\)
Rút gọn : \(\frac{-51}{136}=\frac{-51:17}{136:17}=\frac{-3}{8}\)
\(\frac{-60}{108}=\frac{-60:12}{108:12}=\frac{-5}{9}\)
\(\frac{26}{-156}=\frac{-26}{156}=\frac{-26:26}{156:26}=\frac{-1}{6}\)
Như vậy ta được ba phân số mới đó là : \(\frac{-3}{8};\frac{-5}{9};\frac{-1}{6}\)
Ta phải có : \(MSC=BCNN(8,9,6)=72\)
Quy đồng : \(\frac{-3}{8}=\frac{-3\cdot9}{8\cdot9}=\frac{-27}{72}\)
\(\frac{-5}{9}=\frac{-5\cdot8}{9\cdot8}=\frac{-40}{72}\)
\(\frac{-1}{6}=\frac{-1\cdot12}{6\cdot12}=\frac{-12}{72}\)
Vậy : ....
− 51 136 = − 3 8 ; − 60 108 = − 5 9 ; 26 − 156 = − 1 6
− 3 8 = − 27 72 ; − 5 9 = − 40 72 ; − 1 6 = − 12 72
a: -5/5=-1=-7/7
8/7=8/7
b: -3/15=-1/5=-6/30
5/6=25/30
c: -34/136=-1/4=-9/36
-12/108=-1/9=-4/36
26/-156=-1/6=-6/36
Dấu '/' đọc là phần nha! <3
A= 3469 - 54 / 6938 -108 = 3469 -54 / 2*(1234 -49) = 1/2
B= 2468 - 98 / 3702 - 147 = 2*(1234-49) / 3*(1234-49) =2/3
Sau khi rút gọn p/s ta đc: 1/2 và 2/3 => MC=6
Rồi quy đồng nha bạn
KQ: 3/6 và 4/6
a: -51/136=-3/8
-60/108=-5/9
26/-156=-26/156=-1/6
b: -165/270=-11/18
-91/-156=7/12
-210/1134=-5/27