= 5/3 x ( 15/8 + 9/8) - 5/3
= 5/3 x 3 -5/3
=5- 5/3
= 10/3
nhớ tích cho mình nha mình cảm ơn rất nhìu
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ND
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 :))))
AT
4 tháng 5 2022 lúc 20:56
tính giá trị biểu thức
\(\dfrac{3}{5}x\dfrac{2}{3}:\dfrac{1}{2}=?\)
\(\dfrac{2}{3}\cdot\dfrac{1}{2}+\dfrac{1}{3}=?\)
\(\left(\dfrac{5}{7}+\dfrac{2}{5}\right):\dfrac{11}{7}=?\)
AT
18 tháng 5 2022 lúc 22:57
tính bằng cách thuận tiện
\(4\cdot25\cdot0,25\cdot\dfrac{1}{5}\cdot\dfrac{1}{2}\cdot2=?\)
DT
21 tháng 5 2022 lúc 7:44
\(\dfrac{21}{\cdot}\) x 3 = \(\dfrac{7}{3}\)
a.9 b. 18 c.27 d. 28
\(\dfrac{5}{3}\times\dfrac{15}{8}\times\dfrac{9}{8}\times\dfrac{5}{3}-\dfrac{5}{3}\)
Tìm x:
\(\left(\dfrac{1}{7}\cdot x+\dfrac{4}{7}\right):5-\dfrac{2}{5}=2\)
dấu chấm là nhân.
nhớ đầu đổ nữa nhé
dfrac{1}{3}+dfrac{2}{3}dfrac{4}{5}+dfrac{5}{6}dfrac{4}{5}-dfrac{3}{5}dfrac{9}{8}-dfrac{4}{2}dfrac{8}{5}xdfrac{5}{8}dfrac{6}{7}xdfrac{4}{7}dfrac{4}{5}:dfrac{4}{5}dfrac{5}{5}:dfrac{5}{5}a,
Đọc tiếp
\(\dfrac{1}{3}+\dfrac{2}{3}=\)
\(\dfrac{4}{5}+\dfrac{5}{6}=\)
\(\dfrac{4}{5}-\dfrac{3}{5}=\)
\(\dfrac{9}{8}-\dfrac{4}{2}=\)
\(\dfrac{8}{5}x\dfrac{5}{8}=\)
\(\dfrac{6}{7}x\dfrac{4}{7}=\)
\(\dfrac{4}{5}:\dfrac{4}{5}=\)
\(\dfrac{5}{5}:\dfrac{5}{5}=\)
a,
\(\dfrac{8\dfrac{1}{2}}{15:\dfrac{5}{17}}\) \(\dfrac{4\dfrac{4}{5}:\dfrac{4}{17}}{3\dfrac{2}{5}}\) \(\dfrac{\dfrac{28}{29}:\dfrac{4}{29}}{\dfrac{7}{9}:\dfrac{1}{9}}\) Cứu tui
a)dfrac{7}{8}xdfrac{3}{13}+dfrac{4}{9}xdfrac{4}{13}b)dfrac{6}{5}+dfrac{7}{3}+dfrac{8}{9}c)23: dfrac{5}{14}+dfrac{6}{7}+dfrac{4}{9}d)4dfrac{1}{4}+7dfrac{3}{7}-2dfrac{4}{17}e)8-(9dfrac{2}{11}+dfrac{8}{33})
Đọc tiếp
a)\(\dfrac{7}{8}\)x\(\dfrac{3}{13}\)+\(\dfrac{4}{9}\)x\(\dfrac{4}{13}\)
b)\(\dfrac{6}{5}\)+\(\dfrac{7}{3}\)+\(\dfrac{8}{9}\)
c)23: \(\dfrac{5}{14}\)+\(\dfrac{6}{7}\)+\(\dfrac{4}{9}\)
d)\(4\dfrac{1}{4}\)+\(7\dfrac{3}{7}\)-\(2\dfrac{4}{17}\)
e)8-(9\(\dfrac{2}{11}\)+\(\dfrac{8}{33}\))