Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\left(\dfrac{2}{3}-\dfrac{5}{11}+\dfrac{1}{4}\right):\left(1+\dfrac{5}{12}-\dfrac{7}{11}\right)\)
\(=\left(\dfrac{22}{33}-\dfrac{15}{33}+\dfrac{1}{4}\right):\left(1+\dfrac{5}{12}-\dfrac{7}{11}\right)\)
\(=\left(\dfrac{7}{33}+\dfrac{1}{4}\right):\left(\dfrac{12}{12}+\dfrac{5}{12}-\dfrac{7}{11}\right)\)
\(=\left(\dfrac{28}{132}+\dfrac{33}{132}\right):\left(\dfrac{17}{12}-\dfrac{7}{11}\right)=\dfrac{61}{132}:\dfrac{103}{132}\)
\(=\dfrac{61}{132}\times\dfrac{132}{103}=\dfrac{8052}{13596}=\dfrac{61}{103}\)
\(a) {4\over12}={4.5\over12.5}={20\over60}\)
\({1\over5}={1.12\over5.12}={12\over60}\)
\({-4\over15}={-4.4\over15.5}={-16\over60}\)
b)\({-7\over10}={-7.3\over10.3}={-21\over20}\)
\({1\over2}={1.15\over2.15}={15\over30}\)
\({-4\over15}={-4.2\over15.2}={-8\over30}\)
c)\({-5\over14}={-5.30\over14.30}={-150\over420}\)
\({3\over20}={3.21\over20.21}={63\over420}\)
\({-4\over21}={-4.20\over21.20}={-80\over420}\)
d)\({4\over18}={4.5\over18.5}={20\over90}\)
\({1\over18}={1.18\over5.18}={18\over90}\)
\({-6\over15}={-6.6\over15.6}={-36\over90}\)
Nói lời giữ lời nha ^_^..........Mệt wá........
a)4/12=1.5/12.5=5/60
1/5=1.12/5.12=5/60
-4/15=-4.4/15.4=-16/60
b)-7/10=-7.3/10.3=-21/30
1/2=1.15/2.15=15/30
-4/15=-4.2/15.2=-8/30
c)-5/14=-5.30/14/30=150/420
3/20=3.21/20.21=63/420
-4/21=-4.20/21.20=-80/420
d)4/18=4.5/18.5=20/90
1/5=1.18/5.18=18/90
-6/15=-6.6/15.6=-36/90
6/2 + 3/4 = 15/4
5/15 + 2/3 = 1
12/24 + 7/11 = 25/22
15/8 + 11/5 = 163/40
5/6 - 2/3 = 1/6
10/5 - 5/20 = 7/4
53/4 - 20/5 = 37/4
31/10 - 4/15 = 17/6
6/2 + 3/4 = 15/4
5/15 + 2/3 = 1
12/24 + 7/11 = 25/22
15/8 + 11/5 = 163/40
5/6 - 2/3 = 1/6
10/5 - 5/20 = 7/4
53/4 - 20/5 = 37/4
31/10 - 4/15 = 17/6