6 tháng 6 2022 lúc 16:31
Các câu hỏi tương tự
Tìm a
a) \(2\dfrac{3}{4}-a+\dfrac{1}{4}=1\dfrac{1}{2}\)
b)3\(\dfrac{1}{4}-a-1\dfrac{3}{4}=\dfrac{7}{8}\)
c) 2\(\dfrac{5}{6}-1\dfrac{1}{2}-a=\dfrac{1}{6}\)
Bài 5:
a) 4\(\dfrac{1}{2}\) + \(\dfrac{1}{2}\) : 5\(\dfrac{1}{2}\)
b) \(\dfrac{7}{6}\) : (\(\dfrac{1}{2}\) x \(\dfrac{3}{4}\)) - \(\dfrac{5}{8}\)
16 tháng 10 2021 lúc 15:24
VÒNG 2Bài 1: Mèo con nhanh nhẹndfrac{1}{2} + dfrac{1}{12}2 + dfrac{1}{6}dfrac{1}{20}1 - dfrac{1}{9} dfrac{1}{15} + dfrac{2}{15}dfrac{1}{2} + dfrac{2}{3}dfrac{7}{12}dfrac{4}{12} dfrac{9}{14}+ dfrac{1}{14}1 + dfrac{1}{6}dfrac{1}{4} - dfrac{1}{5}dfrac{1}{3} - dfrac{2}{9} dfrac{3}{2} + dfrac{2}{3}dfrac{1}{5}1 - dfrac{8}{9} dfrac{5}{7}1 - dfrac{2}{3}dfrac{1}{3} + dfrac{5}{9}
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VÒNG 2
Bài 1: Mèo con nhanh nhẹn
| \(\dfrac{1}{2}\) + \(\dfrac{1}{12}\) | 2 + \(\dfrac{1}{6}\) | \(\dfrac{1}{20}\) | 1 - \(\dfrac{1}{9}\) | |
| \(\dfrac{1}{15}\) + \(\dfrac{2}{15}\) | \(\dfrac{1}{2}\) + \(\dfrac{2}{3}\) | \(\dfrac{7}{12}\) | \(\dfrac{4}{12}\) | |
| \(\dfrac{9}{14}\)+ \(\dfrac{1}{14}\) | 1 + \(\dfrac{1}{6}\) | \(\dfrac{1}{4}\) - \(\dfrac{1}{5}\) | \(\dfrac{1}{3}\) - \(\dfrac{2}{9}\) | |
| \(\dfrac{3}{2}\) + \(\dfrac{2}{3}\) | \(\dfrac{1}{5}\) | 1 - \(\dfrac{8}{9}\) | ||
| \(\dfrac{5}{7}\) | 1 - \(\dfrac{2}{3}\) | \(\dfrac{1}{3}\) + \(\dfrac{5}{9}\) |
Bài 1: (đề 2) Tính
a) \(2\dfrac{3}{8}:3\dfrac{3}{4}x2\dfrac{2}{3}\)=............
b) \(1\dfrac{1}{2}:\dfrac{7}{3}:2\dfrac{5}{6}\)=............
c) \(4\dfrac{2}{3}-1\dfrac{3}{4}:2\dfrac{2}{5}\)=............
Tìm x: (\(\dfrac{1}{2}\)+\(\dfrac{1}{4}\)+\(\dfrac{1}{8}\)+\(\dfrac{1}{16}\)) : x= \(\dfrac{1}{2}\)+\(\dfrac{1}{6}\)+...\(\dfrac{1}{132}\)
Tính
a)5 \(\dfrac{3}{8}\)+ 1 \(\dfrac{1}{4}\)+ 3\(\dfrac{6}{7}\)
b) 2\(\dfrac{3}{8}\)- 1\(\dfrac{1}{4}\)+ 5 \(\dfrac{1}{3}\)
bài 4: (đề 2) Tìm a
a) \(2\dfrac{3}{4}-a+\dfrac{1}{4}=1\dfrac{1}{2}\) b) \(3\dfrac{1}{4}-a-1\dfrac{3}{4}=\dfrac{7}{9}\) c) \(2\dfrac{5}{6}-1\dfrac{1}{2}-a=\dfrac{1}{6}\)
\(A=\dfrac{1}{15}+\dfrac{1}{35}+\dfrac{1}{65}+...+\dfrac{1}{99}=\dfrac{16}{x}\)
\(B=\dfrac{5}{6}+\dfrac{11}{12}+\dfrac{19}{20}+\dfrac{29}{30}+\dfrac{41}{42}+\dfrac{55}{56}+\dfrac{x}{16}\)\(C=\left(1-\dfrac{1}{4}\right)\times\left(1-\dfrac{1}{9}\right)\times\left(1-\dfrac{1}{16}\right)\times...\times\left(1-\dfrac{1}{100}\right)=\dfrac{22}{x}\)
m.ng giúp em với
Bài 2: (Đề1) Tính
4dfrac{2}{3}+3dfrac{2}{7}..........................
8dfrac{5}{9}:5dfrac{1}{2} ..........................
6dfrac{5}{7}:2dfrac{1}{6} ..........................
1dfrac{3}{4}x2dfrac{5}{6} ..........................
5dfrac{3}{4}-2 ..........................
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Bài 2: (Đề1) Tính
\(4\dfrac{2}{3}+3\dfrac{2}{7}\)=..........................
\(8\dfrac{5}{9}:5\dfrac{1}{2}\) =..........................
\(6\dfrac{5}{7}:2\dfrac{1}{6}\) =..........................
\(1\dfrac{3}{4}x2\dfrac{5}{6}\) =..........................
\(5\dfrac{3}{4}-2\) =..........................
1 tháng 10 2021 lúc 15:34
3\(\dfrac{1}{3}\)+\(\dfrac{5}{6}\) 4\(\dfrac{5}{7}\)-2\(\dfrac{11}{21}\) 3\(\dfrac{1}{4}\)x\(\dfrac{2}{5}\) 4\(\dfrac{7}{8}\):\(\dfrac{1}{4}\)