tính
a).3/7+2/3
b).8/7-12/28x7/3
c).5/6x3
d).3/2:7/15
làm đầy đủ 4 câu phép tính + đáp án ddaayd đủ tick 3
lẹ dùm nhé m.n ơii
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a, 13/6+5/8 : -3/4 - 7/12.4
= 13/6 + -5/6-7/3
=8/6-7/3
= -6/6
= -1
b, ( 73/5 - 21/3) + ( 4/3-43/5 )
= 73/5-21/3+4/3-43/5
=( 73/5-43/5)-(21/3-4/3)
= 6-17/3
=1/3
c, 7/5.4/9 +7/5: 9/16- 14/10.2/9
= 7/5.4/9 +7/5.16/9 - 14/45
=7/5.(4/9+16/9)-14/45
=7/5.20/9-14/45
= 140/45 - 14/45
= 126/45
Xong rùi nè! Nhưng bạn kiểm tra lại giùm nhé vì làm vào ban đêm nên hơi bất tiện
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
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.
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)\(3\frac{2}{5}.2\frac{1}{7}=\frac{17}{5}.\frac{15}{7}=\frac{51}{7}\)
b) \(8\frac{1}{6}:2\frac{1}{2}=\frac{49}{6}:\frac{5}{2}=\frac{49}{6}.\frac{2}{5}=\frac{49}{15}\)
a)2/5+3/10-1/2=7/10-1/2=2/10=1/5
b)8/11+8/33x3/4=8/11+2/11=10/11
c)7/9x3/14:5/8=1/6:5/8=8/30+4/15
d)5/12-7/32:21/16=5/12-1/6=3/12
nha
a) 2/5+3/10-1/2
= 4/10+3/10-5/10
= 2/10 = 1/5
b) 8/11+8/33x3/4
= 8/11+2/11
= 10/11
c) 7/9x3/14:5/8
= 1/6:5/8
= 1/6x8/5
=4/15
d) 5/12-7/32:21/16
= 5/12-7/32x16/21
= 5/12-1/6
= 5/12-2/12
= 3/12
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
\(a;\frac{3}{7}+\frac{2}{3}=\frac{9}{21}+\frac{14}{21}=\frac{23}{21}\)
\(b;\frac{8}{7}-\frac{12}{28}\times\frac{7}{3}=\frac{8}{7}-\frac{3}{7}\times\frac{7}{3}=\frac{8}{7}-1=\frac{8}{7}-\frac{7}{7}=\frac{1}{7}\)
\(c;\frac{5}{6}\times3=\frac{15}{6}=\frac{5}{2}\)
\(d;\frac{3}{2}:\frac{7}{15}=\frac{3}{2}\times\frac{15}{7}=\frac{45}{14}\)
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