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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
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) \(\frac{2}{5}+\frac{3}{6}=\frac{12}{30}+\frac{15}{30}\)
\(=\frac{12+15}{30}\)
\(=\frac{27}{30}=\frac{9}{10}\)
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
\(a;\frac{3}{7}+\frac{2}{3}=\frac{9}{21}+\frac{14}{21}=\frac{23}{21}\)
\(b;\frac{8}{7}-\frac{12}{28}\times\frac{7}{3}=\frac{8}{7}-\frac{3}{7}\times\frac{7}{3}=\frac{8}{7}-1=\frac{8}{7}-\frac{7}{7}=\frac{1}{7}\)
\(c;\frac{5}{6}\times3=\frac{15}{6}=\frac{5}{2}\)
\(d;\frac{3}{2}:\frac{7}{15}=\frac{3}{2}\times\frac{15}{7}=\frac{45}{14}\)
a) 3/7+2/3=9/21+14/21=23/21
b) 8/7-12/28*7/3=8/7-1=8/7-7/7-1/7
c) 5/6*3=5/2
d) 3/2:7/15=3/2*15/7=45/14
a=3/4*7/6=1/2+1/3=5/6
b=5/3*9/15=1-1/5=4/5
c=1/4*1/5=1/20:1/3=3/20
d=7/9:14/15=5/6*1/2=5/12
A, 5/6 + 13/6 = 3
B, 9/16 - 3/8 = 3/16
C, 2/9 x 5/3 = 10/27
D, 4/6 + 7/3 x 5/2 = 13/2
a,3/7 : 5/8 = 24/56 : 35/56 = 24/35
b, 8/7 : 3/4 = 32/28 : 21/28 = 32/21
c, 1/3: 1/2 = 2/6 : 3/6 =2/3
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.