180360180

\(13\cdot42\cdot33\cdot26\cdot35\)

\(=\left(42\cdot35\right)\cdot\left(13\cdot26\right)\cdot33\)

\(=1470\cdot338\cdot33\)

\(=16396380\)

  \(\dfrac{26}{7}\) x \(\dfrac{11}{3}-\dfrac{26}{7}\) x \(\dfrac{2}{3}-\dfrac{6}{3}\) x \(\dfrac{26}{7}\)

\(=\dfrac{26}{7}\) x \(\left(\dfrac{11}{3}-\dfrac{2}{3}-\dfrac{6}{3}\right)\)

\(=\dfrac{26}{7}\) x \(\dfrac{3}{3}\)

\(=\dfrac{26}{7}\) x \(1=\dfrac{26}{7}\)

26/7 x 11/3 - 26/7 x 2/3 - 6/3 x 26/7

=( 11/3 - 2/3 - 6/3 ) x26/7

=      1 x 26/7

=         26 /7

Tick cho mình nha

267267 x 113−267113−267 x 23−6323−63 x 267267

=267=267 x (113−23−63)(113−23−63)

=267=267 x 3333

=267=267 x 1=267

Ta có:

=\(\dfrac{6x45x11x17}{15x12x34x33}\)

= \(\dfrac{6x15x3x11x17}{15x6x2x17x2x11x3}\)

= \(\dfrac{1}{2x2}\)

=\(\dfrac{1}{4}\)

Những chữ x ở trên là dấu nhân nhé

34 x 28 - 34 x 11 - 7 x 34

= 34 x (28 - 11 - 7)

= 34 x 10

= 340

= 65 x ( 121 + 11) - 35 x ( 17 + 115 ) 

= 65 x 132 - 35 x 132 

= ( 65 - 35) x 132 

= 30 x 132 

= 3960

65x121-35x17+11x65-115x35=3.960

\(65\cdot121-35\cdot17+11\cdot65-115\cdot35\)

\(=65\cdot\left(11+121\right)-35\cdot\left(115+17\right)\)

\(=65\cdot132+35\cdot132\)

\(=132\cdot\left(65+35\right)\)

\(=132\cdot100\)

\(=13200\)

\(=25\%+25\%\times38+25\%\times50+25\%\times11\)

\(=25\%\times\left(1+38+50+11\right)=25\%\times100=25\)

\(\dfrac{25}{100}+\dfrac{1}{4}\times38+25\%\times50+0,25\times11\)

\(0,25+0,25\times38+0,25\times50+0,25\times11+1\)

\(0,25\times\left(38+50+11+1\right)\)

\(0,25\times100\)

\(25\)

21/11 x 22/17x68/63

= 7x3x2x11x4x17      /           11x17x7x3x3

=8/3

5/14x7/13x26/25

=5x7x26              /                14x13x25

= 5x7x13x2             /              7x2x13x5x5

=1/5

cậu có thể giảng kĩ hơn được ko mình ko hiểu 1 tí nào 

21 / 11 x 22 / 17 x 68 /63 

Sao khong ai giai bai nấy vậy nè.

a. mình ko biết

b. 5/14 x 7/13 x 26/26 = 5 x 7 x 13 x 2/7 x 2 x 13 x 5 = ( gạch các số giống nhau ở 2 vế ) + 1/5