26 × 8 + 4 × 13 - 10 × 26
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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 !!!
= 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*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
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
Tính:
a, 8.( -9/12 )
b, ( -14/5 ) . (-10)
c, 9. ( 4/-3 )
d, -15. ( -5/6 )
e, 13. ( -2/7 )
f, 7/26. ( -13 )
\(a,8.\left(\dfrac{-9}{12}\right)=\dfrac{8.\left(-9\right)}{12}=\dfrac{-72}{12}=-6\\ b,\left(\dfrac{-14}{5}\right).\left(-10\right)=\dfrac{\left(-14\right).\left(-10\right)}{5}=\dfrac{140}{5}=28\\ c,9.\left(\dfrac{4}{-3}\right)=\dfrac{9.\left(-4\right)}{3}=\dfrac{-36}{3}=-12\\ d,-15.\left(\dfrac{-5}{6}\right)=\dfrac{\left(-15\right).\left(-5\right)}{6}=\dfrac{75}{6}\\ e,13.\left(\dfrac{-2}{7}\right)=\dfrac{13.\left(-2\right)}{7}=\dfrac{-26}{7}\\ f,\dfrac{7}{26}.\left(-13\right)=\dfrac{7.\left(-13\right)}{26}=\dfrac{-91}{26}\)
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
\(6=\dfrac{12}{2}\)
\(9=\dfrac{18}{2}\)
\(4=\dfrac{8}{2}\)
\(12=\dfrac{24}{2}\)
\(11=\dfrac{22}{2}\)
\(10=\dfrac{20}{2}\)
\(13=\dfrac{26}{2}\)
\(23=\dfrac{46}{2}\)
\(30=\dfrac{60}{2}\)
=76 804
26 x 8 + 4 x 13 - 10 x 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
Chúc bạn học tốt !!!