Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
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
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 : ....
\(\frac{3469-54}{6928-108}=\frac{3469-54}{2.\left(3469-54\right)}=\frac{1}{2}\)
\(\frac{2468-98}{3702-147}=\frac{2\left(1234-49\right)}{3\left(1234-49\right)}=\frac{2}{3}\)
Rút gọn:
\(A=\frac{2483-13}{4966-26}=\frac{13.\left(191-1\right)}{26.\left(191-1\right)}\)
\(=\frac{13.190}{26.190}=\frac{13}{26}=\frac{1}{2}\)
\(B=\frac{2727-101}{7575+303}=\frac{101.\left(27+1\right)}{303.\left(25+1\right)}\)
\(=\frac{101.26}{303.26}=\frac{101}{303}=\frac{1}{3}\)
Quy đồng:
\(\frac{1}{2}\)và \(\frac{1}{3}\)
\(\frac{1}{2}=\frac{1.3}{2.3}=\frac{3}{6}\) \(\frac{1}{3}=\frac{1.2}{3.2}=\frac{2}{6}\)
A = \(\frac{3469-54}{6938-108}\)
= \(\frac{3469-54}{2\left(3469-54\right)}\)
= \(\frac{1}{2}\)
B = \(\frac{2468-98}{3702-147}\)
= \(\frac{2\left(1234-49\right)}{3\left(1234-49\right)}\)
= \(\frac{2}{3}\)
BCNN(2,3) = 6
\(\frac{1}{2}=\frac{1.3}{2.3}=\frac{3}{6}\)
\(\frac{2}{3}=\frac{2.2}{3.2}=\frac{4}{6}\)
\(A=\frac{3469-54}{6938-108}=\frac{3469-54}{3469.2-54.2}=\frac{3469-54}{2.\left(3469-54\right)}=\frac{1}{2}=\frac{1.3}{2.3}=\frac{3}{6}\)
\(B=\frac{2468-98}{3702-147}=\frac{1234.2-49.2}{1234.3-49.3}=\frac{2.\left(1234-49\right)}{3.\left(1234-49\right)}=\frac{2}{3}=\frac{2.2}{3.2}=\frac{4}{6}\)
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
− 51 136 = − 3 8 ; − 60 108 = − 5 9 ; 26 − 156 = − 1 6
− 3 8 = − 27 72 ; − 5 9 = − 40 72 ; − 1 6 = − 12 72