Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{5}{12}+\frac{5}{6}-\frac{3}{4}\)
\(=\frac{5}{12}+\frac{10}{12}-\frac{9}{12}\)
\(=\frac{5+10-9}{12}\)
\(=\frac{6}{12}\)
\(=\frac{1}{2}\)
\(\frac{3}{5}+\frac{6}{4}+\frac{5}{2}\)
\(=\frac{24}{40}+\frac{60}{40}+\frac{100}{40}\)
\(=\frac{24+60+100}{40}\)
\(=\frac{184}{40}\)
Tự rứt gọn nha !
a] 4/12 ; 5/12 ; 11/2 ; 1/4
b] 1 ; 9/12; 12/5 ; 11/3
c] 8/21; 6/11;8/7
d] 2/3 ;2/7 15/2
a]1/3 5/12 11/2 1/4
b]1 3/4 12/5 33/9
c]8/21 6/11 8/7
d]2/3 2/7 15/2
5/9x12/7=20/21
6/5:8/3=9/20
9/20x5/12=3/16
15/16:25/24=9/10
14x5/21=10/3
10:5/3=6
5/3:10=1/6
5/9 x 12/7 = 60/63
6/5 : 8/3 = 6/5 x 3/8 = 9/20
9/20 x 5/12 = 3/16
15/16 : 25/24 = 15/16 x 24/25 = 9/10
14 x 5/21 = 60/21
10 : 5/3 = 10 x 3/5 = 6
5/3 : 10 = 5/3 x 1/10 = 1/6
Ta có thể đổi chỗ các phân số :
A)(7/12+5/12)+(4/9+1/3)+2=12/12+7/9+2=1+2+7/9=3+7/9=34/9
B)6/5*(3/8+5/8)-4/5=6/5*1-4/5=6/5-4/5=2/5
5/12 : 2/5 - 1/3 : 2/5 + 7/12 : 2/5
= 5/12 x 5/2 - 1/3 x 5/2 + 7/12 x 5/2
= (5/12 - 1/3 + 7/12) x 5/2
= (5/12 + 7/12 - 1/3) x 5/2
= (1 - 1/3) x 5/2
= (3/3 - 1/3) x 5/2
= 2/3 x 5/2
= 5/3
\(\frac{5}{12}\):\(\frac{2}{5}\)-\(\frac{1}{3}\): \(\frac{2}{5}\)+ \(\frac{7}{12}\):\(\frac{2}{5}\)= ( \(\frac{5}{12}\)-\(\frac{1}{3}\)+\(\frac{7}{12}\)) : \(\frac{2}{5}\)
= ( \(\frac{1}{12}\)+ \(\frac{7}{12}\)) : \(\frac{2}{5}\)
= \(\frac{8}{12}\): \(\frac{2}{5}\)
=\(\frac{5}{3}\)
a)12/5-4/9x5/6=274/135
b)5/6x9/20:2/3=9/16
c)8/9x7/4+5/12x8/3=8/3
17/12 x 3/5 + 3/5 x 1/2 + 3/5
= (17/12 + 1/2 + 1) x 3/5
= 35/12 x 3/5
= 7/4
\(\dfrac{5}{3}-\dfrac{5}{12}=\dfrac{5\cdot4-5}{12}=\dfrac{20-5}{12}=\dfrac{15}{12}=\dfrac{5}{4}\)