21116070

10843158 nha

a/

=2323 x (3434+5656)

=2323 x 9090

=21 116 070

b/

=1234 x (4244+4543)

=1234 x 8787

=10 843 159

2323+2323

=4646

ahihi

rat vui khi dc lam quen my friends

2323 + 2323

= 2323 x 2

= 4646

nha bn 

NHỚ MIK ĐẤY

2 323 + 2 323

= 2 323 x 2

= 4 646.

\(\dfrac{121212}{353535}+-\dfrac{2323}{4242}\)

\(=\dfrac{12}{35}+-\dfrac{23}{42}\)

\(=-\dfrac{43}{210}\)

\(=\dfrac{12}{35}-\dfrac{23}{42}=\dfrac{72-115}{210}=\dfrac{-43}{210}\)

0                                      

\(\frac{2323+1313+1414+1515+1616}{4141+2222+2323+2424+2525}\)

=\(\frac{8181}{13635}\)

18180,8               

2323/5656 = 23/56

232323/565656 = 23/56

Vậy 3 p/s bằng nhau

thanks

bạn làm rõ hơn cho mình nhé!

mik làm xong kết bn với mik nhé

thì cứ làm đi

\(\frac{1010+1111+1212+1313+1414+1515}{2020+2121+2222+2323+2424+2525}=\frac{10\times101+11\times101+12\times101+13\times101+14\times101+15\times101}{20\times101+21\times101+22\times101+23\times101+24\times101+25\times101}=\frac{101\times\left(10+11+12+13+14+15\right)}{101\times\left(20+21+22+23+24+25\right)}\)

\(=\frac{10+11+12+13+14+15}{20+21+22+23+24+25}=\frac{75}{135}=\frac{5}{9}\)

1010+1111+1212+1313+1414+1515= 7575

2020+2121+2222+2323+2424+2525= 13635

có 1 dấu gạch ngang mờ nhạt kìa bạn