hông bn gái thì đc chứa nam thì có cái nịt
\(\dfrac{-6}{15}-\dfrac{3}{10}=\dfrac{-12-9}{30}=\dfrac{-21}{30}\)
Tính nhanh
A=2/15+(5/6-6/9)
B=-1/5+3/12
C=4/10+16/20+6/15+-3/5+2/21+-10/21+3/12
B=\(\dfrac{7.6^{10}.2^{21}.3^6-2^{19}.6^{15}}{9.6^{15}.2^{13}-4.3^{15}.2^{26}}\)
30^25*6^5*3^5
15^15*10^10
( 25^6 + 15^6 - 10^6 ) : 5^6 - ( 5^6 + 3^6 )
10 + { 5 - [ 3 - (- 4) - (+ 6) ] + [ 12 - (- 7) + (-3) - (+ 15) ] } - (10) + (- 5)
tính : 10+{5-[3-(-4)-(+6)]+[12-(-7)+(-3)-(+15)]}-(-10)+(-5)
Câu 1: Tính giá trị biểu thức:
a.A=\(\left(\dfrac{136}{15}-\dfrac{28}{5}+\dfrac{62}{10}\right)\).\(\dfrac{21}{24}\)
b.B=\(\dfrac{5}{6}\)+6\(\dfrac{5}{6}\)\(\left(11\dfrac{5}{20}-9\dfrac{1}{4}\right)\):8\(\dfrac{1}{3}\)
c.C=1+3+6+10+15+...+1225.
\(\frac{2^{18}.18^7.3^3+3^{15}.2^{15}}{2^{10}.6^{15}+3^{14}.15.4^{13}}\)= ?
1+3+6+10+15+...+1225
