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10 tháng 3 2022 lúc 9:18
Tính hợp lí :A dfrac{-2}{9} + dfrac{-3}{4} + dfrac{3}{5} + dfrac{1}{15} + dfrac{1}{57} + dfrac{1}{3} + dfrac{-1}{36}B dfrac{1}{2} + dfrac{-1}{5} + dfrac{-5}{7} + dfrac{1}{6} + dfrac{-3}{35} + dfrac{1}{3} + dfrac{1}{41}C dfrac{-1}{2} + dfrac{3}{5} + dfrac{-1}{9} + dfrac{1}{127} + dfrac{-7}{18} + dfrac{4}{35} + dfrac{2}{7}
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Tính hợp lí :
A = \(\dfrac{-2}{9}\) + \(\dfrac{-3}{4}\) + \(\dfrac{3}{5}\) + \(\dfrac{1}{15}\) + \(\dfrac{1}{57}\) + \(\dfrac{1}{3}\) + \(\dfrac{-1}{36}\)
B = \(\dfrac{1}{2}\) + \(\dfrac{-1}{5}\) + \(\dfrac{-5}{7}\) + \(\dfrac{1}{6}\) + \(\dfrac{-3}{35}\) + \(\dfrac{1}{3}\) + \(\dfrac{1}{41}\)
C = \(\dfrac{-1}{2}\) + \(\dfrac{3}{5}\) + \(\dfrac{-1}{9}\) + \(\dfrac{1}{127}\) + \(\dfrac{-7}{18}\) + \(\dfrac{4}{35}\) + \(\dfrac{2}{7}\)
tính
\(4\dfrac{1}{5}\times2\dfrac{1}{4}=\) \(3\dfrac{3}{5}\times1\dfrac{2}{3}=\)
\(4\dfrac{1}{5}:2\dfrac{1}{4}=\) \(3\dfrac{3}{5}:1\dfrac{2}{3}=\)
bài 3: Tìm y
a) \(\dfrac{1}{2}\) : y x \(\dfrac{3}{5}=\dfrac{4}{3}+\dfrac{3}{4}\) b) \(\dfrac{4}{3}-\dfrac{1}{2}\) x y \(=1\) c) \(\dfrac{1}{4}+y\) : \(\dfrac{1}{3}=\dfrac{5}{6}\)
Bài 6: ( Đề 1) Tìm y
a) \(3\dfrac{1}{5}:2\dfrac{1}{3}:y=\dfrac{12}{7}\) b) \(3:yx3\dfrac{1}{2}=\dfrac{2}{3}x\dfrac{3}{4}\) c) \(3\dfrac{2}{3}-y+1\dfrac{3}{4}=2\)
Bài 1: tính
a) 3dfrac{1}{2} + 4dfrac{5}{7} - 5dfrac{5}{14} b) 4dfrac{1}{2} + dfrac{1}{2} : 5dfrac{1}{2}
bài 2: tìm X
a) X x 3dfrac{1}{3} 3dfrac{1}{3} : 4dfrac{1}{4} b) 5dfrac{2}{3} : X 3dfrac{2}{3} - 2dfrac{1}{2}
các giáo viên olm giúp e vs, e cần gấp lắm!
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Bài 1: tính
a) 3\(\dfrac{1}{2}\) + 4\(\dfrac{5}{7}\) - 5\(\dfrac{5}{14}\) b) 4\(\dfrac{1}{2}\) + \(\dfrac{1}{2}\) : \(5\dfrac{1}{2}\)
bài 2: tìm X
a) X x \(3\dfrac{1}{3}\) = \(3\dfrac{1}{3}\) : \(4\dfrac{1}{4}\) b) \(5\dfrac{2}{3}\) : X = \(3\dfrac{2}{3}\) - \(2\dfrac{1}{2}\)
các giáo viên olm giúp e vs, e cần gấp lắm!
Tìm y
a) 3 \(\dfrac{1}{5}\) : 2\(\dfrac{1}{3}\): y = \(\dfrac{12}{7}\)
b) 3 : y x 3 \(\dfrac{1}{2}\)= \(\dfrac{2}{3}x\dfrac{3}{4}\)
c) \(3\dfrac{2}{3}-y+1\dfrac{3}{4}=2\)
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) \(4\dfrac{2}{3}-1\dfrac{3}{4}:2\dfrac{2}{5}\)=............
Bài 6: Tìm x, biết
a) dfrac{3}{2} x dfrac{4}{5} - X dfrac{2}{3}
b) X x 3dfrac{1}{3} 3dfrac{1}{3} : 4dfrac{1}{4}
c) 5dfrac{2}{3} : x 3dfrac{2}{3} - 2dfrac{1}{2}
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Bài 6: Tìm x, biết
a) \(\dfrac{3}{2}\) x \(\dfrac{4}{5}\) - X =\(\dfrac{2}{3}\)
b) X x 3\(\dfrac{1}{3}\) = 3\(\dfrac{1}{3}\) : 4\(\dfrac{1}{4}\)
c) 5\(\dfrac{2}{3}\) : x = 3\(\dfrac{2}{3}\) - 2\(\dfrac{1}{2}\)
22 tháng 4 2023 lúc 11:48
Tìm X
X:3\(\dfrac{1}{15}\)-\(\dfrac{3}{4}\)=2\(\dfrac{1}{4}\)
X nhân 3\(\dfrac{2}{3}\)-1\(\dfrac{2}{3}\)=2\(\dfrac{1}{3}\)