![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{5}{6}-\dfrac{25}{36}=\dfrac{30}{36}-\dfrac{25}{36}=\dfrac{5}{36}\)
Tử số a bằng:
10:5 x 30 = 60
Mẫu số b bằng:
10:5 x 36 = 72
Phân số a/b: 60/72
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Anh làm 1 câu thôi nhá, sắp thi anh rồi ;-;
x = 5/4 - 2/3
x = 7/12
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(\left(\dfrac{4}{6}+\dfrac{14}{6}\right)+\left(\dfrac{7}{13}+\dfrac{19}{13}\right)+\left(\dfrac{17}{9}+\dfrac{1}{9}\right)=\dfrac{18}{6}+\dfrac{26}{13}+\dfrac{18}{9}=3+2+2=7\)
b)\(\dfrac{6}{7}+\left(\dfrac{2}{1}-\dfrac{6}{7}\right)=\dfrac{6}{7}+\left(\dfrac{14}{7}-\dfrac{6}{7}\right)=\dfrac{6}{7}+\dfrac{8}{7}=\dfrac{14}{7}=2\)
c)\(\dfrac{2}{3}\times\left(\dfrac{15}{19}+\dfrac{4}{19}\right)=\dfrac{2}{3}\times\dfrac{19}{19}=\dfrac{2}{3}\times1=\dfrac{2}{3}\)
a)(46+146)+(713+1913)+(179+19)=186+2613+189=3+2+2=7(46+146)+(713+1913)+(179+19)=186+2613+189=3+2+2=7
b)67+(21−67)=67+(147−67)=67+87=147=267+(21−67)=67+(147−67)=67+87=147=2
c)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,\dfrac{7}{12}+\dfrac{3}{4}\times\dfrac{2}{9}=\dfrac{7}{12}+\dfrac{1}{6}=\dfrac{7}{12}+\dfrac{2}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)
\(b,\dfrac{8}{9}-\dfrac{4}{15}:\dfrac{2}{5}=\dfrac{8}{9}-\dfrac{4}{15}\times\dfrac{5}{2}=\dfrac{8}{9}-\dfrac{2}{3}=\dfrac{8}{9}-\dfrac{6}{9}=\dfrac{2}{9}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Trả lời :
858 : 26 = 33
6816 : 32 = 213
@Duy
#Vuaminhthaito
~Hok tốt~
!!!!!!
2/5 m=40 cm nha
ht
\(\frac{2}{5}\)m = 40 cm nha