tính nhanh H = 1414 + 1515 + 1616 + 1717 + 1818 + 1919
rút gọn phân số:
A=1212+1313+1414+...+2020/1717+1818+1919+...+3131
giúp tớ
Câu1: 1563/2555 rút gọn thành phân số nào?
Câu2: 1818/ 2626 rút gọn thành phân số nào?
Câu3: 54km/h=...m/s
Câu4: ...km/h=30m/s
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
So sánh: 1414+1515+1616+1717/1818+1919+2020+2121 va 2424/3636
So sánh 6262 / 7878 và 2424 / 3636
Vì 6262/7878 > 2424/3636
Nên 1414 + 1515 + 1616 + 1717 / 1818 + 1919 + 2020 + 2121 > 2424/3636
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
\(\frac{\text{(1414+1919)+(1515+1818)+(1616+1717) }}{\left(2020+2525\right)+\left(2121+2424\right)+\left(2222+2323\right)}\)\(=\frac{3333+3333+3333}{4545+4545+4545}=\frac{3333}{4545}=\frac{11}{15}\)
Tính nhanh:1414+1515+1616+1717+1818+1919/2020+2121+2222+2323+2424+2525
1414+1515+1616+1717+1818+1919/2020+2121+2222+2323+2424+2525=2525 nhé bạn
