26*8+2*2*13-10*26

=26*8+2*26-10*26

=26*(8+2-10)

=26*0

=0

Nhớ tick mik nha

Ta có: \(26\times8+4\times13-10\times26\)

\(=13\times2\times8+4\times13-10\times2\times13\)

\(=13\times16+4\times13-20\times13\)

\(=13\times\left(16+4-20\right)=13\times0=0\)

26 x 8 + 4 x 13 - 10 x 26

= 13 x 2 x 8 + 4 x 13 - 10 x 2 x 13

= 13 x 16 + 4 x 13 - 20 x 13

= 13 x ( 16 + 4 - 20)

= 13 x 0

= 0

26 x 8 + 4 x13 - 10 x 26 

=13 * 2 * 8 + 4 * 13 - 10 * 2* 13

=13 * 16 + 4 *13 -20 *13

=13 * (16 + 4 - 20)

=13 * 0

=0

   26 × 8 + 4 × 13 - 10 × 26

= 26 x 8 + 2 x ( 2 x 13 ) - 10 x 26

= 26 x 8 + 2 x 26 - 10 x 26

= 26 x ( 8 + 2 - 10 )

= 26 x 0

= 0

\(26\times8+4\times13-10\times26\)

\(=13\times2\times2\times4+4\times13-10\times2\times13\)

\(=13\times4\times4+4\times13-20\times13\)

\(=13\times4\times4+4\times13-4\times5\times13\)

\(=13\times4\times\left(4+1-5\right)\)

\(=13\times4\times0\)

\(=0\)

Chúc bn học tốt !!!

\(26\times8+4\times13-10\times26\)

\(=26\times8+2\times2\times13-10\times26\)

\(=26\times\left(8+2-10\right)\)

\(=26\times0\)

\(=0\)

a, =13x(27+2x35+4-1)=13x100=1300

b, =(99-99):(1x2x...x10)=0

tick nha!

1/13.58.4+32.26.2+52.10

=52.58+52.32+52.10

=52(58+32+10)=52.100=5200

2/15.37.4+120.21+21.5.12

=60.37+120.21+60.21

=60(37+2.21+21)=60.100=6000

= 52 (58 + 32 +10 ) =52 x 100 =5200

\(=\dfrac{29}{13}\cdot\dfrac{13}{29}\cdot4\cdot\dfrac{21}{8}\cdot\dfrac{8}{21}=4\)

bài này mik ra \(\dfrac{39}{29}\) ko bt đúng ko :)

b. \(\dfrac{4.2.3.5.2.6.2.5.3}{4.3.4.5.6.4.5.6}=\dfrac{1}{4}\)

c. \(\dfrac{17.2.101.2005}{17.2.101.2.2005}=\dfrac{1}{2}\)

d. \(\dfrac{2.3.4.2.11.13.17}{3.11.4.4.17.13.2}=\dfrac{1}{2}\)

a)\(\dfrac{4\times6\times10\times12\times15}{4\times12\times5\times24\times30}=\dfrac{2}{2\times2\times2}=\dfrac{2}{8}=\dfrac{1}{4}\)

b)\(\dfrac{34\times101\times2005}{17\times202\times4010}=\dfrac{2}{2\times2}=\dfrac{2}{4}=\dfrac{1}{2}\)

c)\(\dfrac{6\times8\times11\times13\times17}{33\times16\times17\times26}=\dfrac{6}{3\times2\times2}=\dfrac{1}{2}\)