10/11x11/12x24/7x21/2
7x21+28-49=7x21-.....=(7-.....)x21=6.21
7x21+28-49=7x21-21=(7-1)x21=6x21=126
.(20x24+12x24-48x22):26
\(\dfrac{20\cdot2^4+12\cdot2^4-48\cdot2^2}{2^6}\)
\(=\dfrac{2^6\cdot5+2^6\cdot3-2^6\cdot3}{2^6}\)
=5
a) (137x25-25x37):10
b) 2/7x21/4-2/7:13/4
c)(124x237+152):(870+235x122)
d)27x43+27x57/2+4+6+.....+16
e) 5/7x2/11 + 5/7x9/11x9/7
a) (137x25-25x37):10
=25x(137-37):10
=25x100:10
=2500:10
=250
b) 2/7x21/4-2/7:13/4
=2/7x21/4-2/7x4/13
=2/7x(21/4-4/13)
=2/7x257/52
=257/182
c)(124x237+152):(870+235x122)
=(29388+152):(870+28670)
=29540:29540
=1
a) (137 x 25 - 25 x 37 ) : 10 = (25 x (137 - 37) ) : 10
= (25 x 100) : 10
= 2500 : 10
= 250
a) (137x25-25x37):10
b) 2/7x21/4-2/7:13/4
c)(124x237+152):(870+235x122)
d)27x43+27x57/2+4+6+.....+16
e) 5/7x2/11 + 5/7x9/11x9/7
a)=(3425-925):10
=25200:10
=250
b)=3/2-8/91
=257/182
c)=(29388+152):(870+28670)
=29540:29540
=1
d)=1161+1539/72
=2700/72=75/2
e)=10/77+45/77x9/7
=10/77+405/539
=475/539
li ke cho mình nha Lam Le thi
1. tính
a) -2/7x21/8
b) -3/25 :6
a. -2/7 x 21/8
= -3/4
b. -3/25:6
= -3/25 x 1/6
= -1/50
12x24-24=???
AI NHANH MK TICK^^
12 x 24 - 24
= (12 - 1) x 24
= 11 x 24
= 264
Ban An viet:5/7=6x20/12x24
ban an viet dung hay sai
x+3/7x21/9=5
dấu gạch chéo là phân số
\(x+\frac{3}{7}\times\frac{21}{9}=5\)
\(\Rightarrow x+\frac{3}{7}\times\frac{7}{3}=5\)
\(\Rightarrow x+1=5\)
\(\Rightarrow x=5-1=4\)
\(X+1=5\)
\(X=5-1\)
\(X=4\)
VẬY X=4
K NHÁ BN
X+\(\frac{3}{7}\)x\(\frac{21}{9}\)=5
X+1=5
X=4
Vay X=..
lan sau viet p/s ban nhin o thanh cong cu co cai chu z lon nguoc day bam vao roi chon
4/7x21/16:5/8=
15/8-4/9x6/8+1/6=
7/15+(5/6-1/3)=
= 3/4 : 5/8 = 6/5
= 15/8 - 1/3 + 1/6 = 37/24 + 1/6 = 41/23
= 7/15 + 1/2 = 29/30
mk có giải cho bạn lần trc rồi ạ!! bạn xem lại đi ạ ;-;"
\(\dfrac{4}{7}x\dfrac{21}{6}x\dfrac{8}{5}=\dfrac{16}{5}\)
\(\dfrac{15}{8}-\dfrac{4}{9}x\dfrac{6}{8}+\dfrac{1}{6}=\dfrac{41}{24}\)
\(\dfrac{7}{15}+\left(\dfrac{5}{6}-\dfrac{1}{3}\right)=\dfrac{29}{30}\)
12x24-6x52+100
Ai trả lời nhanh và đúng thì mình tích cho +lời giải chi tiết nha
12x24=288.
6x52=312.
288-312= -24.
-24+100=76.