2323/1818 x 727272/696969 =
(nêu rõ cách làm )
tính nhanh : 1515/2323 x 696969/545454 x 2727/1515
=15/23.(69/54./27/15)
=15/23.23/10
=3/2
\(=\dfrac{15}{23}\times\dfrac{69}{54}\times\dfrac{27}{15}\\ =\dfrac{3}{2}\)
=15/23 x (69/54 x /27/15)
=15/23 x 23/10
=3/2
tính bằng cách thuận tiện nhất: 18*{363636/727272-2323/9292} = ?
tinh nhanh 8 x ( 363636 /727272 - 2323/9292)
18 : ( 1111/3636 +141414/727272 - 808/1818)
làm hộ nha
=18/\(\left(\dfrac{11}{36}+\dfrac{7}{36}-\dfrac{4}{9}\right)\)
\(=18\)\(\)/\(\dfrac{1}{18}=324\)
1414+1515+1616+1717+1818+1919/2020+2121+2222+2323+2424+2525
Đề bài kiểu gì vậy?VIết rõ hơn đi
1414+1515+1616+1717+1818+1919
2020+2121+2222+2323+2424+2525
tính nhanh
2005x2004-1004/2003x2005+1001 + 1818/2323 + 1 5/23
1414+1515+1616+1717+1818+1919/2020+2121+2222+2323+2424+2525
1414+1515+1616+1717+1818+1919 phần 2000+2121+2222+2323+2424+2525
\(\frac{1414+1515+1616+1717+1818+1919}{2000+2121+2222+2323+2424+2525}\)
\(=\frac{101.\left(14+15+16+17+18+19\right)}{101.\left(20+21+22+23+24+25\right)}\)
\(\frac{14+15+16+17+18+19}{20+21+22+23+24+25}=\frac{99}{135}=\frac{11}{15}\)
L_I_K_E NHA
1414+1515+1616+1717+1818+1919 / 2020+2121+2222+2323+2424+2525 = ?
Đinh Tuấn Việt trả lời linh tinh để kiếm l-i-k-e kìa
\(\frac{\text{(1414+1919)+(1515+1818)+(1616+1717) }}{\left(2020+2525\right)+\left(2121+2424\right)+\left(2222+2323\right)}\)\(=\frac{3333+3333+3333}{4545+4545+4545}=\frac{3333}{4545}=\frac{11}{15}\)