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 !!!

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

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

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

\(=26\times0\)

\(=0\)

= 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

=0

Ngu thế cũng hỏi dễ vãi lồn cũng không biết làm não dính cứt à nhok

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

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

=26*(8+2-10)

=26*0

=0

Nhớ tick mik nha

\(26\times8+4\times13-10\times26\)
\(=26\times8+2\times2\times13-10\times26\)
\(=26\times8+2\times26-10\times26\)
\(=26\times\left(8+2-10\right)\)
\(=26\times0\)
\(=0\)
#Đang Bận Thở

\(26\times8+4\times13-10\times26\\ =13\times2\times8+4\times13-10\times2\times13\\ =13\times\left(2\times8+4-10\times2\right)\\ =13\times0\\ =0\)

O

a) 3/13+4/7/26+1/1/2 va 4/3+4/37+55/111

3/13+111/26+3/2

=6

* 4/3+4/37+55/111

=55/37 =1,486

=> a> b

Lik-e ung ho nha

lớp 1 mà cậu

4.24.5²-(3³.18+3³.12)

=4.24.25-[27.(18+12)]

=(4.25).24-[27.30]

=100.24-810

=2400-810

=1590

4.24.5^2-(3^3.18+3^3.12)

31.15.7^2.4-31.49.40

1+2+3+4+5+6+7+8+9+10

1+3+5+7+9+11+13+15+19

2+6+10+14+22+23+26+34

5+8+11+14+17+20+23+26+29

1+6+11+16+21+26+31+36+41+47+51

10+13+16+19+22+25+28+31+34+37+40

5+7+9+11+13+15+17+3+8+13+18+23+28

4+7+10+13+16+19+5+9+13+17+21+25 = 1590

#HT#

\(a,8.\left(\dfrac{-9}{12}\right)=\dfrac{8.\left(-9\right)}{12}=\dfrac{-72}{12}=-6\\ b,\left(\dfrac{-14}{5}\right).\left(-10\right)=\dfrac{\left(-14\right).\left(-10\right)}{5}=\dfrac{140}{5}=28\\ c,9.\left(\dfrac{4}{-3}\right)=\dfrac{9.\left(-4\right)}{3}=\dfrac{-36}{3}=-12\\ d,-15.\left(\dfrac{-5}{6}\right)=\dfrac{\left(-15\right).\left(-5\right)}{6}=\dfrac{75}{6}\\ e,13.\left(\dfrac{-2}{7}\right)=\dfrac{13.\left(-2\right)}{7}=\dfrac{-26}{7}\\ f,\dfrac{7}{26}.\left(-13\right)=\dfrac{7.\left(-13\right)}{26}=\dfrac{-91}{26}\)

a, 8.( -9/12 )=-6

b, ( -14/5 ) . (-10)=28

c, 9. ( 4/-3 )=-12

d, -15. ( -5/6 )=25/2

e, 13. ( -2/7 )-36/7

f, 7/26. ( -13 )=-7/2

Tính các tổng sau:

1, S=1-2+3_4+..+25-26

S =-1+3-5+7-...-53+55                       ( có 28 số hạng )

   = (-1+3)+(-5+7)+...+(-53+55)         ( có 28:2=14 nhóm )

   = 2+2+...+2

    = 2 . 14

     = 28

Á nhầm rùi xl bn nha

3 

S =-1+3-5+7-...-53+55     ( có 28 số hạng )

   = (-1+3)+(-5+7)+...+(-53+55)      ( có 28:2=14 nhóm )

   = 2+2+...+2

    = 2 . 14

     = 28

\(6=\dfrac{12}{2}\)

\(9=\dfrac{18}{2}\)

\(4=\dfrac{8}{2}\)

\(12=\dfrac{24}{2}\)

\(11=\dfrac{22}{2}\)

\(10=\dfrac{20}{2}\)

\(13=\dfrac{26}{2}\)

\(23=\dfrac{46}{2}\)

\(30=\dfrac{60}{2}\)