a)4/7x(10/4+4/5)

=4/7x33/10=66/35

b)(17/35x35/17)x(11/5x25/11)

=1x5=5

xin 1 like( outo đúng nhé)

a: \(\frac{10}{4}\times\frac47+\frac47\times\frac45\)

\(=\frac47\times\frac52+\frac47\times\frac45\)

\(=\frac47\times\left(\frac52+\frac45\right)=\frac47\times\left(\frac{25}{10}+\frac{8}{10}\right)=\frac47\times\frac{33}{10}=\frac{132}{70}=\frac{66}{35}\)

b: \(\frac{11}{5}\times\frac{17}{35}\times\frac{25}{11}\times\frac{35}{17}\)

\(=\frac{11}{5}\times\frac{25}{11}\times\frac{17}{35}\times\frac{35}{17}\)

\(=\frac{11}{5}\times\frac{25}{11}=\frac{25}{5}=5\)

=35 x 6 - 35 x2x3 + 35 

=35 x 6 - 35 x6 + 35 

=(35 x 6 - 35 x6) + 35

=0 + 35

=35

Ta có : 35 x 6 - 70 x 3 + 35 = 35 x 6 - 35 x 2 x 3 + 35 = 35 x 6 + 35 x 6 + 35 = 35

Ta có: 36x5-70+35 = 36x5-14x5+7x5 = (36-14+7)x5 = 29x5 = 145

= 35 x ( 67 - 17 + 50 )

= 35 x 100 = 3500

mk nha ngọc

35x67-35x17+35x50

=35x(67-17+50)

=35x100

=3500

(56-49-7)(1+2+3+4+5+6+7+8+9+10)=0x(1+2+3+4+5+6+7+8+9+10)=0

    56 -49 - 7 = 0 

0 nhân số nào cũng bằng 0

C1 :

2205 : ( 35 x 7 )

= 2205:  245

= 9

C2

2205 : ( 35 x 7 )

= 2205 : 35 : 7

= 63 : 7

= 9

k mk nha

C1: \(2205:\left(35.7\right)=2205:245=9\)

C2:\(2205:\left(35.7\right)\)

\(=2205:35:7\)

\(=63:7\)

\(=9\)

\(28+35+62+95+73+69+27+1\)

\(=\left(28+62\right)+\left(35+95\right)+\left(73+27\right)+\left(69+1\right)\)

\(=90+130+100+70=390\)

(28+62)+(35+95)+(73+27)+(69+1)=

90+130+100+70=390

Đs:390

35 nha

Học tốt

5 x 5 + 6 + 4 

= 5 x 5 + ( 6 + 4 )

= 5 x 5 + 10

= 25 + 10

= 35

29x5 + 29x3 +29x2

= 29x(5+3+2)

= 29x10

= 290

ai giúp k