bằng \(\frac{6}{7}\)nha bạn
úm ba la xin tích
\(\frac{3}{7}:0,5=\frac{3}{7}:\frac{5}{10}=\frac{3}{7}:\frac{1}{2}=\frac{3}{7}x\frac{2}{1}=\frac{6}{7}nha\)
A)X x 2 +X x 0,5 =10
\(\frac{4}{7}\)+\(\frac{3}{7}\): X =\(\frac{3}{2}\)
Bài 7 :Tính nhanh:
a) 2/3:5/7x5/7:2/3+1934
b) (30 : \(7\frac{1}{2}\)+0,5 x 3 -1,5 ) x (\(4\frac{1}{2}-\frac{9}{2}\)) : ( 14,5 x 1000 )
c) (1999 x 1998 + 1998 x 1997 ) x ( 1 + 1/2 : 1\(\frac{1}{2}\)-1\(\frac{1}{3}\))
Bài 1:Tìm x,biết:
a)(1,5*1,9-x-0,5):0,25=7,5:0,125
b)1-\(\left(5\frac{2}{9}+x-7\frac{7}{18}\right)\):2\(\frac{1}{6}\)=0
c)35*\(\left(2\frac{1}{5}-x\right)\)=32
d)\(\frac{4}{3}\)+\(\left(x:2\frac{2}{3}-0,5\right)\)*1\(\frac{35}{55}\)=0,6
e)1\(\frac{1}{3}\)*2\(\frac{2}{4}:\frac{5}{6}\)*1\(\frac{1}{11}\)=11-5:x
Mình cần gấp lắm!Ai nhanh nhất mik tik nha!
\(\frac{7}{10}\)- y = 0,5 + 0,68
a) \(15\frac{1}{4}:\left(-\frac{5}{7}\right)-25\frac{1}{4}:\left(-\frac{5}{7}\right)\)
b) \(5\frac{5}{27}+\frac{7}{27}+0,5-\frac{5}{27}+\frac{16}{23}\)
\(\frac{7}{10}\)- y = 0,5+ 0,18
( 30: 7 \(\frac{1}{2}\) + 0,5 x 3 - 1,5 ) x (4 \(\frac{1}{2}\) - 9/2) : (14,5 x10)
\(\frac{0,8.0,04.1,25+0,6524+0,3476}{10.125.4.25._{ }8}\)
Tính nhanh:
\(\left(30:7\frac{1}{2}+0,5\times31,5\right)\times\left(4\frac{1}{2}-\frac{9}{2}\right):\left(1,45\times10\right)\)
Ai nhanh mk tik cho 3 tik nha ^_^
Bài 7 :Tính nhanh:
a) 2/3:5/7x5/7:2/3+1934
b) (30 : 7\(\frac{1}{2}\) +0,5 x 3 -1,5 ) x (4\(\frac{1}{2}\)−\(\frac{9}{2}\)) : ( 14,5 x 1000 )
c) (1999 x 1998 + 1998 x 1997 ) x ( 1 + 1/2 : 1\(\frac{1}{2}\) -1\(\frac{1}{3}\) )
