tính
a) 2x3x8/4x5x6x7
b) 36x22x51/11x17x72
Giúp mk nha , cảm ơn
A)3x2x8
4x5x6x7
B) 36x22x51
11x17x72
`a)[3xx2xx8]/[4xx5xx6xx7]`
`=[3xx2xx4xx2]/[4xx5xx3xx2xx7]`
`=2/[5xx7]=2/35`
`b)[36xx22xx51]/[11xx17xx72]`
`=[9xx4xx11xx2xx17xx3]/[11xx17xx9xx4xx2]`
`=3`
\(\dfrac{3\times2\times2\times2\times2}{2\times2\times5\times2\times3\times7}=\dfrac{2}{35}\)
a) \(\dfrac{3.2.8}{4.5.6.7}=\dfrac{1.1.4}{2.5.2.7}=\dfrac{2}{35}\)
b) \(\dfrac{36.22.51}{11.17.72}=\dfrac{1.2.3}{1.1.2}=\dfrac{6}{2}=3\)
1.Tính :
a)\(\frac{2x3x8}{4x5x6x7}\)=.............
b)\(\frac{36x22x51}{11x17x72}\)=.............
a , 2 / 35 chỉ cần rút gọn thôi
b , 3 cũng giống ý a
2x3x4x2/4x5x2x3x7
=2/5x7
=2/35
b)
36x11x2x17x3/11x17x36x2
=3
tính nhanh bằng cách rút gọn \(\frac{21x45}{9x7x5x3}\)\(\frac{36x22x51}{11x17x72}\)\(\frac{1313}{2121}\)x\(\frac{165165}{143143}\)x \(\frac{199319931993}{199519951995}\)
2 Tính nhanh
\(\frac{6x4x18x25}{8x1012x15}\) b) \(\frac{1995}{1996}\)x\(\frac{19961996}{19931993}\)x \(\frac{199319931993}{199519951995}\)
2x3x8/4x5x6x7
`[2xx3xx8]/[4xx5xx6xx7]=[2xx3xx4xx2]/[4xx5xx2xx3xx7]=2/[5xx7]=2/35`
`(2 xx 3 xx 8)/(4 xx 5 xx 6 xx 7)`
`= (2 xx 3 xx 4 xx 2)/(4 xx 5 xx 3 xx 2 xx 7)`
`= (cancel{2} xx cancel{3} xx cancel{4} xx 2)/(cancel{4 xx 5 xx cancel{3} xx cancel{2} xx 7)`
`= 2/(5 xx 7)`
`= 2/35`
2x3x8/4x5x6x7
\(\frac{2x3x8}{4x5x6x7}=\frac{2x3x2x4}{2x2x5x2x3x7}=\frac{4}{70}\)
\(\frac{4}{70}=\frac{2}{35}\)
k mik nha
2x3x8
4x5x6x7
Ai là ngửi đàu tiên mk sẽ tick
2 x 3 x 8
=6 x 8
= 48
4 x 5 x 6 x 7
= 20 x 6 x 7
= 120 x 7
= 840
Tích mik nhé bank
2x3x8
= 6 x 8
= 48
4x5x6x7
= 20x42
=840
2 x 3 x 8 = 6 x 8 = 48
4 x 5 x 6 x 7 = 20 x 6 x 7 = 120 x 7 = 840
tính
a) (x+1)2
\(\left(x+1\right)^2=x^2+2x+1\)
Bài 1:Tính
a)(-12)+25+75+12;
b)60+12+(-17)+(-43)
c)(-2)+(-87)+(-18)+87;
d)(-1)+(-2)+36+(-17)
Bài 2:Tính
a)(-17) . 6
b)8 . (-125)
c)(-12) . (-15)
d)21 . (- 3)+(- 21 ) . 7
Bài 1:
a: =25+75=100
b: =60-17-43+12=12
c: =-2-18=-20
d: =-3+36-17=36-20=16
Bài 2:
a: =-102
b: =-1000
c: =12x15=180
d: =21x(-10)=-210
B1
a 100
b 12
c -20
d 16
B2
a -102
b -1000
c 180
d -210
Bài 1:Tính
a)(-12)+25+75+12 = 100
b)60+12+(-17)+(-43)=12
c)(-2)+(-87)+(-18)+87=-20
d)(-1)+(-2)+36+(-17)=16
Bài 2:Tính
b)8 . (-125)=-100
c)(-12) . (-15)=180
d)21 . (- 3)+(- 21 ) . 7=-210
Tính
a, 23.15 - [ 115 + ( 12 - 25 ) ]