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\(a;\frac{3}{7}+\frac{2}{3}=\frac{9}{21}+\frac{14}{21}=\frac{23}{21}\)
\(b;\frac{8}{7}-\frac{12}{28}\times\frac{7}{3}=\frac{8}{7}-\frac{3}{7}\times\frac{7}{3}=\frac{8}{7}-1=\frac{8}{7}-\frac{7}{7}=\frac{1}{7}\)
\(c;\frac{5}{6}\times3=\frac{15}{6}=\frac{5}{2}\)
\(d;\frac{3}{2}:\frac{7}{15}=\frac{3}{2}\times\frac{15}{7}=\frac{45}{14}\)
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) 2/5 + 1/2 + 7/10
= 4/10 + 5/10 + 7/10
= 9/10 + 7/10
= 16/10 = 8/5
b) 4/9 + 11/8 - 5/6
= 32/72 + 99/72 - 60/72
= 191/72
c) 9/20 - 8/15 x 5/12
= 9/20 - 2/9
= 41/180
d) 2/3 : 4/5 : 7/12
= 5/6 : 7/12
= 10/7
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
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
a2/4x4/7= 2/7 b 10/21:5/7=2/3 c10/21:2/3=5/7 d1/5x1/3=1/15
e1/15:1/5=1/3 g 1/15:1/5= 1/3 h 1/15:1/3= 105
k mình nhé bạn
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
a) \(\frac{4}{7}:\frac{8}{11}=\frac{4}{7}\times\frac{11}{8}\)
\(=\frac{44}{56}=\frac{22}{23}\)
b) \(\frac{3}{5}+\frac{4}{5}:\frac{2}{5}=\frac{3}{5}+\frac{4}{5}\times\frac{5}{2}\)
\(=\frac{3}{5}+2\)
\(=\frac{13}{5}\)
a: 4/7:8/11=4/7x11/8=44/56=11/14
b: 3/5+4/5:2/5
= 3/5+4/5x5/2
= 3/5+10/5
=13/5
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.
Bài 1 phần D
Bài 2:
\(\frac{1}{4}\)x\(\frac{5}{3}\):\(\frac{2}{7}\)
= \(\frac{5}{12}\): \(\frac{2}{7}\)
=\(\frac{35}{24}\)
k mình nhá, thanks !!!
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