1414+1515+1616+1717+1818+1919/2020+2121+2222+2323+2424+2525
=14.101+15.101+16.101+17.101+18.101+19.101/20.101+21.101+22.101+23.101+24.101+25.101
=14+15+16+17+18+19/20+21+22+23+24+25
=99/135
=11/15
giup minh giai với :
1414+1515+1616+1717+1818+1919/2020+2121+2222+2323+2424+2525
tks nhiều nhé
\(\frac{1414+1515+1616+1717+1818+1919}{2020+2121+2222+2323+2424+2525}\)
Thực hiện phép tính:
\(\frac{1414+1515+1616+1717+1818+1919}{2020+2121+2222+2323+2424+2525}\)
1/3 + 1/15 + 1/35+ 1/63 + 1/99+ 1/143+ 1/195
b) \(\frac{1414+1515+1616+1717+1818+1919}{2020+2121+2222+2323+2424+2525}\)
Ai biết làm bài này thì giúp mik nhé
So sánh: 1414+1515+1616+1717/1818+1919+2020+2121 va 2424/3636
1\3+1\15+1\35+1\63+1\99+1\143=1\195
1414+1515+1616+1717+1818+1919
2020+2121+2323+2424+2525
2 tim x
( 7*13+8*13):(29\3 tru x) bang 39
1\3+1\6+1\10+.....+2\x*(x+1) bang 2011\203
rút gọn phân số:
A=1212+1313+1414+...+2020/1717+1818+1919+...+3131
giúp tớa,\(\frac{1995\cdot1994-1}{1994+1996\cdot1995}\)b,\(\frac{864\cdot48-432\cdot96}{864\cdot48\cdot432}\)c,\(\frac{1414+1515+1616+1717+1818+1919}{20\cdot20+21\cdot21+22\cdot22+23\cdot23+24\cdot24+25\cdot25}\)
d,\(\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+\frac{1}{15}+\frac{1}{21}+...+\frac{1}{3240}\)
2020 + 2121 + 2222 +2323+...+3333
giups mk nhe!
