Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
2/3 + 7/1 = 2/3 + 7 = 2/3 + 21/3 = 23/3
25/48 + 11/24 = 25/48 + 22/48 = 47/48
5/7 + 3/8 = 40/56 + 21/56 = 61/56
15/24 + 12/6 = 5/8 + 2 = 5/8 + 16/8 = 21/8
5/6 + 4/3 = 5/6 + 8/6 = 13/6
3/8 + 7/12 = 9/24 + 14/24 = 23/24
\(=\dfrac{3}{7}\times\left(\dfrac{1}{5}+\dfrac{2}{3}-\dfrac{1}{8}\right)\\ =\dfrac{3}{7}\times\left(\dfrac{24}{5\times24}+\dfrac{2\times40}{3\times40}-\dfrac{15}{8\times15}\right)\\ =\dfrac{3}{7}\times\left(\dfrac{24+80-15}{120}\right)\\ =\dfrac{3}{7}\times\dfrac{89}{120}\\ =\dfrac{89}{280}\)
\(\dfrac{3}{7}\times\dfrac{1}{5}+\dfrac{2}{3}\times\dfrac{3}{7}-\dfrac{3}{7}\times\dfrac{1}{8}\)
\(=\dfrac{3}{7}\times\left(\dfrac{1}{5}+\dfrac{3}{7}-\dfrac{1}{8}\right)\)
\(=\dfrac{3}{7}\times\dfrac{56+120-35}{280}\)
\(=\dfrac{3}{7}\times\dfrac{141}{280}\)
\(=\dfrac{423}{1960}\)
\(\frac{1}{2}+\frac{1}{3}+\frac{5}{9}\)
MSC : 18
\(\frac{1}{2}+\frac{1}{3}+\frac{5}{9}=\frac{9}{18}+\frac{6}{18}+\frac{10}{18}=\frac{25}{18}\)
a: 7/9=7/9; 2/3=6/9
b: 4/10=8/20
11/20=11/20
c: 4/25=12/75
3/75=3/75
d: 4/25=16/100
5/100=5/100
e: 17/60=17/60
4/5=48/60
g: 5/9=20/36
7/36=7/36
h: 2/10=2/10
9/5=18/10
i: 53/16=53/16
3/4=12/16
aaa : ( ax3 ) - 360 : ( 5x2 )
= aaa : a x 3 - 360 : 10
= (aaa : a) x 3 - 360 : 10
= 111 x 3 - 36
= 333 - 36= 297