Tính roi rut gon:
A).2/7:4/5 b).3/8:9/4 c).8/21:4/7
D).5/8:15/8
Ai lam day du phep tinh va cach rug gon mik tick 2 cai lan
Tính rồi rút gọn:
A).2/7:4/5 b).3/8:9/4 c).8/21:4/7 d).5/8:15/8
Ai lam day du buoc mik tick 2.huju giup ik
\(a,\frac{2}{7}:\frac{4}{5}=\frac{2}{7}\times\frac{5}{4}=\frac{10}{28}=\frac{5}{14}\)
\(b,\frac{3}{8}:\frac{9}{4}=\frac{3}{8}\times\frac{4}{9}=\frac{12}{72}=\frac{1}{6}\)
\(c,\frac{8}{21}:\frac{4}{7}=\frac{8}{21}\times\frac{7}{4}=\frac{56}{84}=\frac{2}{3}\)
\(d,\frac{5}{8}:\frac{15}{8}=\frac{5}{8}\times\frac{8}{15}=\frac{40}{120}=\frac{1}{3}\)
A,\(\frac{2}{7}:\frac{4}{5}=\frac{2}{7}\times\frac{5}{4}=\frac{10}{28}=\frac{5}{14}\)
B,\(\frac{3}{8}:\frac{9}{4}=\frac{3}{8}\times\frac{4}{9}=\frac{12}{72}=\frac{1}{6}\)
C.\(\frac{8}{21}:\frac{4}{7}=\frac{8}{21}\times\frac{7}{4}=\frac{56}{84}=\frac{2}{3}\)
D.\(\frac{5}{8}:\frac{15}{8}=\frac{5}{8}\times\frac{8}{15}=\frac{40}{120}=\frac{1}{3}\)
Đúng 100%
a, \(\frac{2}{7}:\frac{4}{5}=\)\(\frac{2}{7}x\)\(\frac{5}{4}\)\(\frac{10}{28}=\frac{5}{14}\)
b,\(\frac{3}{8}:\frac{9}{4}\)\(=\frac{3}{8}x\)\(\frac{4}{9}\)\(=\frac{12}{72}=\frac{1}{6}\)
c,\(\frac{8}{21}:\frac{4}{7}\)\(=\frac{8}{21}x\)\(\frac{7}{4}\)\(=\frac{56}{84}=\frac{2}{3}\)
d,\(\frac{5}{8}:\frac{15}{8}\)\(\frac{5}{8}x\)\(\frac{8}{15}=\frac{40}{120}=\frac{1}{3}\)
tk giup mk nha
Rút gọn rồi tính:
A).3/5:3/4 b).2/5;3/10 c).9/8:3/4
D).1/4:1/2 e).1/8:1/6 g).1/5:1/10
Ai lam day du phep tinh cach giai mik tick.noi luon ra dap an mik ko tick
Giup di tixk 2 caik
a) 3/5:3/4=3/5x4/3=(3x4)/(5x3)=12/15=4/5
b)2/5:3/10=2/5x10/3=(2x10)/(5x3)=20/15=4/3
c)9/8:3/4=9/8x4/3=(9x4)/(8x3)=36/32=9/8
d)1/4:1/2=1/4x2=2/4=1/2
e)1/8:1/6=1/8x6=6/8=3/4
g)1/5:1/10=1/5x10=10/5=2
a) 3/5 : 3/4 = 4/5
b) 2/5 : 3/10 = 4/3
c) 9/8 : 3/4 = 3/2
d) 1/4 : 1/2 = 1/2
e) 1/8 : 1/6 = 3/4
g) 1/5 : 1/10 = 2
tk tớ nha
a)3/5:3/4=3/5x4/3=12/15=4/5
b)2/5:3/10=2/5x10/3=20/15=5/3
c)9/8:3/4=9/8x4/3=36/24=3/2
d)1/4:1/2=1/4x2=1/2
e)1/8:1/6=1/8x6=3/4
g)1/5:1/10=1/5x10=2
Tính roi rut gon:
A).3/5;3/4 2/5;3/10 9/8;3/4
B).1/4;1/2 1/8;1/6 1/5;1/10
Ai lm day du phep tinh mik tick.noi luon ra ket qua mik ko tick
a)3/5:3/4=12/15=4/5
2/5:3/10=20/15=4/3
9/8:3/4= 32/24=4/3
b)1/4:1/2=2/4=1/2
1/8:1/6=6/8=3/4
1/5:1/10=10/5=2/1=2
kích cho mình nha
Tính bằng 2 cách:
A).(6/11+5/11)x3/7
B).3/5+7/9-3/5x2/9
C).(6/7+4/7):2/5
D).8/15:2/11+7/15:2/11
Lam day du 2 cach moi cau tick 3!!day du nhe.le len
A. C1: (6/11 + 5/11) x 3/7 = 1 x 3/7 = 3/7
C2: (6/11 + 5/11) x 3/7 = 6/11 x 3/7 + 5/11 x 3/7 = 18/77 + 15/77 = 3/7
a)Cách 1:
(6/11+5/11)x3/7
=11/11x3/7
=1x3/7
=3/7
Cách 2:
(6/11+5/11)x3/7
=6/11x3/7+5/11x3/7
=18/77 + 15/77
=33/77
=3/7 (mink đã rút gọn)
k nhé
Voi 4 chu so 2 va cac phep tinh , hay lap ra day tinh de co ket qua lan luot la 1 , 2, 3 , 4 , 5 , 6 , 7 , 8 ,9 , 10
Vi du 0= 2×2-2×2
1=2:2+2-2
2=2:2+2:2
3=2*2-2:2
4=2*2*2:2
5=2*2+2:2
6=2*2*2-2
7=???????
8=2*2+2*2
9=???????
10=2*2*2+2
TÍNH RỒI RÚT GỌN:
A).1/5:2/15 b).3/7:9/14
C).7/12:21/24 d).9/13:27/26
Ai lam day du phep tinh dap so mik tick 2 luon nha
Jupp
a) \(\frac{1}{5}:\frac{2}{15}=\frac{1}{5}\times\frac{15}{2}\)
\(=\frac{15}{10}=\frac{3}{2}\)
b)\(\frac{3}{7}:\frac{9}{14}=\frac{3}{7}\times\frac{14}{9}\)
\(=\frac{42}{63}=\frac{2}{3}\)
c) \(\frac{7}{12}:\frac{21}{24}=\frac{7}{12}\times\frac{24}{21}\)
\(=\frac{168}{252}=\frac{2}{3}\)
d) \(\frac{9}{13}:\frac{27}{26}=\frac{9}{13}\times\frac{26}{27}\)
\(=\frac{234}{351}=\frac{2}{3}\)
k nha
A/ 15/10 = 3/2
B/ 42/63 = 2/3
C/ 168/252 = 2/3
D/ 234/351 = 2/3
Cho 4 chu so 2 va cac phep tinh , hay lap day tinh co ket qua lan luot la 1 2 3 4 5 6 7 8 9 10
B 3/7+ 4/8 = ?
Tim x thuoc Z biet:
a, |x-5|+x+3=16
b, |x-5|-7≥9
c, |x-4|>x+2
d, ||x+5|-4|=3
khan cap ngay mai minh phai nop roi
lam nhanh va cach lam day du minh se tick
a)x=9
d)x=-12;-6;-4;2
khẩn cấp thì ghi đáp án cho nhanh