Tính (theo mẫu).Mẫu: \(5\times\dfrac{2}{9}=\dfrac{5}{1}\times\dfrac{2}{9}=\dfrac{5\times2}{1\times9}=\dfrac{10}{9}\)Ta có thể viết gọn như sau:\(5\times\dfrac{2}{9}=\dfrac{5\times2}{9}=\dfrac{10}{9}\) a) \(3\times\dfrac{4}{11}\) b) \(1\times\dfrac{5}{4}\) ...
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Tính (theo mẫu).
Mẫu: \(5\times\dfrac{2}{9}=\dfrac{5}{1}\times\dfrac{2}{9}=\dfrac{5\times2}{1\times9}=\dfrac{10}{9}\) Ta có thể viết gọn như sau: \(5\times\dfrac{2}{9}=\dfrac{5\times2}{9}=\dfrac{10}{9}\) |
a) \(3\times\dfrac{4}{11}\) b) \(1\times\dfrac{5}{4}\) c) \(0\times\dfrac{2}{5}\)
a) \(3\times\dfrac{4}{11}=\dfrac{3\times4}{11}=\dfrac{12}{11}\)
b) \(1\times\dfrac{5}{4}=\dfrac{1\times5}{4}=\dfrac{5}{4}\)
c) \(0\times\dfrac{2}{5}=\dfrac{0\times2}{5}=\dfrac{0}{5}=0\)
a: \(=\dfrac{3\cdot4}{11}=\dfrac{12}{11}\)
b: \(=\dfrac{1\cdot5}{4}=\dfrac{5}{4}\)
c: \(=\dfrac{0\cdot2}{5}=0\)