= 88/15 . 3/4 - (8/15 + 25/100)
= 22/5 - (8/15 + 1/4)
= 22/5 - 47/60
= 264/60 - 47/60
= 217/60
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7 tháng 5 2022 lúc 14:55
A = \(\dfrac{28}{25}\) + \(\dfrac{9}{10}\) - \(\dfrac{11}{15}\) + \(\dfrac{13}{21}\) - \(\dfrac{15}{28}\) + \(\dfrac{17}{26}\) - ... + \(\dfrac{197}{4851}\) - \(\dfrac{199}{4950}\)
20 tháng 6 2021 lúc 18:18
Bài 2: Tính nhanh:
a) \(\dfrac{3}{4}\cdot\dfrac{8}{9}\cdot\dfrac{15}{16}\cdot\dfrac{24}{25}\cdot.....\cdot\dfrac{120}{121}\cdot\dfrac{143}{144}\)
b)\(\dfrac{5}{9}\cdot\dfrac{21}{25}\cdot\dfrac{45}{49}\cdot\dfrac{77}{81}\cdot.....\dfrac{357}{361}\cdot\dfrac{437}{441}\)
ai làm đúng mk dùng 3nick mk tick cho :))))
tính:
\(2\dfrac{3}{13}\) x \(\dfrac{26}{58}\) x 4 x \(2\dfrac{15}{24}\) x \(\dfrac{8}{21}\)
tính:
\(2\dfrac{3}{13}\) x \(\dfrac{26}{58}\) x 4 x \(2\dfrac{15}{24}\) x \(\dfrac{8}{21}\)
tìm kết quả tích sau:
A= \(\dfrac{8}{9}\)x\(\dfrac{15}{16}\)x\(\dfrac{24}{25}\)x...x\(\dfrac{2499}{2500}\)
24 tháng 9 2023 lúc 17:46
\(\dfrac{7}{13}\) : \(x\) = \(\dfrac{14}{39}\)
\(x\) x \(\dfrac{3}{5}\) = \(\dfrac{14}{15}\)
\(\dfrac{5}{3}\cdot\dfrac{15}{8}\cdot\dfrac{9}{8}\cdot\dfrac{5}{3}-\dfrac{5}{3}\)
\(\dfrac{5}{3}\times\dfrac{15}{8}\times\dfrac{9}{8}\times\dfrac{5}{3}-\dfrac{5}{3}\)
Tính bằng cách thuận tiện nhất
\(\dfrac{13}{18}\) x \(\dfrac{9}{26}\) x \(\dfrac{2}{3}\) =
\(\dfrac{44}{15}\) x \(\dfrac{5}{22}\) x \(\dfrac{3}{2}\) =