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Tính
a ) 5/2 x 1/3 + 1/4
= 5/5+1/4
=13/12
b)5/2 + 1/3 x 1/4
= 5/2 + 1/12
= 31/12
c ) 5/2 -1/3 :1/4
= 5/2 - 4/3
= 7/6
tk mk nha ( nếu đúng )
hihi mơn nha !!!!!!!!!!
a. = (5/2x2/3) +1/4
= 5/3+1/4= 23/12
b. = 5/2+( 1/3x1/4)
= 5/2+1/12
=31/12
c. =5/2-( 1/3:1/4)
= 5/2-4/3
= 7/6
Bài 1
a 2/5+3/6=12/30+15/30=27/30=9/10 .
b 5/9-1/6=30/54-9/54=21/54=7/18
a) \(5+\frac{1}{4}=\frac{20}{4}+\frac{1}{4}=\frac{21}{4}\)
b) \(7-\frac{3}{5}=\frac{35}{5}-\frac{3}{5}=\frac{32}{5}\)
b) \(2\times\frac{9}{11}=\frac{18}{11}\)
d) \(\frac{2}{34}:5=\frac{2}{34}:\frac{5}{1}=\frac{2}{34}\times\frac{1}{5}=\frac{2}{170}=\frac{1}{85}\)
ủng hộ nha.
a) \(\frac{2}{5}+\frac{3}{6}=\frac{12}{30}+\frac{15}{30}\)
\(=\frac{12+15}{30}\)
\(=\frac{27}{30}=\frac{9}{10}\)
b) \(\frac{5}{9}-\frac{1}{6}=\frac{30}{54}-\frac{9}{54}\)
\(=\frac{30-9}{54}\)
\(=\frac{21}{54}=\frac{7}{18}\)
c) \(\frac{3}{4}\times\frac{7}{9}=\frac{3\times7}{4\times9}\)
\(=\frac{27}{36}=\frac{3}{4}\)
d) \(\frac{15}{18}:\frac{3}{36}=\frac{15}{18}\times\frac{36}{3}\)
\(=\frac{15\times36}{18\times3}\)
\(=\frac{540}{54}=10\)
Vậy a) 9/10 b) 7/18 c) 3/4 ; d) 10
ủng hộ nha
a) 2/5+3/6
= 12/30+15/30
=27/30=9/10
b)5/9-1/6
=10/18-3/18
=7/18
c)3/4*7/9
=21/36=7/12
d)15/18:/36
=10/3
Đề bài sai nhé!
A, X x 4/8 = 4/8
x = 4/8 : 4/8
x = 1
B, 1/9 + x + 1 - 3/18
= 1/9 + 1 + 1 - 3/18
= 35/18
`@Fù`
`=1/(1×2)+1/(2×3)+1/(3×4)+...+1/(72×73)`
`=1/1-1/2+1/2-1/3+...+1/72-1/73`
`=1-1/73`
`=72/73`
a}3/4x2/9+1/3=3x2/4x9+1/3=6/36+1/3=6/36+12/36=18/36=1/2
b}1/4:1/3-1/2=1x3/4x1-1/2=3/4-1/2=3/4-2/4=1/4
đáp số : a}1/2
b}1/4
Tính
a ) 1/2 x 1/4 x 1/6
= 1/8 x 1/6
= 1/48
b ) 1/2 x 1/4 : 1/6
= 1/8:1/6
3/4
c ) 1/2 : 1/4 x 1/6
= 2 x 1/6
= 1/3
tk mk nha ( nếu đúng )
hihi mơn nha !!!!!!!!!
a, : 1/2 x 1/4 x 1/6 = 1/8 x 1/6 = 1/48
b, ; 1/2 x 1/4 : 1/6 = 1/8 : 1/6 = 6/8 = 3/4
c, 1/2 : 1/4 x 1/6 = 4/2 x 1/6 = 4/12 = 1/3