12/5 - 2/3 : 4/5
= 12/5 - 5/6
= 47/30
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Tính:
a) \(\dfrac{11}{10}+\dfrac{3}{5}:\dfrac{2}{3}\)
b) \(\dfrac{4}{3}\) + 5 x \(\dfrac{5}{8}\)
c) \(\left(\dfrac{2}{5}+\dfrac{3}{7}\right)x\dfrac{25}{29}\)
d) \(\dfrac{1}{4}x\dfrac{5}{12}+\dfrac{5}{12}x\dfrac{4}{5}\)
\(\dfrac{2}{3}+\dfrac{5}{12}-\dfrac{3}{5}\)
\(\dfrac{3}{4}\) x \(\dfrac{4}{7}+\dfrac{5}{14}\)
8 tháng 7 2023 lúc 10:05
tính thuận tiện:dfrac{4}{5}+dfrac{2}{3}+dfrac{1}{5}+dfrac{1}{3} dfrac{17}{12}+dfrac{29}{7}-dfrac{8}{7}+dfrac{7}{12} dfrac{9}{15}+dfrac{16}{7}+dfrac{2}{5}-dfrac{1}{7}-dfrac{2}{14} dfrac{2}{5}+dfrac{6}{9}+dfrac{7}{4}+dfrac{3}{5}+dfrac{1}{3}+dfrac{1}{4}mik sẽ chỉ tick 3 bn xong trước phải chi tiết rõ ràng
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tính thuận tiện:
\(\dfrac{4}{5}+\dfrac{2}{3}+\dfrac{1}{5}+\dfrac{1}{3}\) \(\dfrac{17}{12}+\dfrac{29}{7}-\dfrac{8}{7}+\dfrac{7}{12}\) \(\dfrac{9}{15}+\dfrac{16}{7}+\dfrac{2}{5}-\dfrac{1}{7}-\dfrac{2}{14}\)
\(\dfrac{2}{5}+\dfrac{6}{9}+\dfrac{7}{4}+\dfrac{3}{5}+\dfrac{1}{3}+\dfrac{1}{4}\)
mik sẽ chỉ tick 3 bn xong trước phải chi tiết rõ ràng
\(x +\dfrac{5}{9} =\dfrac{4}{3}\)
\(x -\dfrac{4}{9}=\dfrac{2}{3}\)
\(\dfrac{5}{8}+x=\dfrac{8}{5} \)
\(\dfrac{5}{6}-x=\dfrac{1}{12}\)
Bài1 tính:a)dfrac{2}{5}+dfrac{5}{12}; b)dfrac{2}{3} - dfrac{3}{8}; c)dfrac{3}{7} ✖ dfrac{4}{9}; d) dfrac{11}{10} - dfrac{2}{5} ː dfrac{2}{3}
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Bài1 tính:
a)\(\dfrac{2}{5}\)+\(\dfrac{5}{12}\); b)\(\dfrac{2}{3}\) - \(\dfrac{3}{8}\); c)\(\dfrac{3}{7}\) ✖ \(\dfrac{4}{9}\); d) \(\dfrac{11}{10}\) - \(\dfrac{2}{5}\) ː \(\dfrac{2}{3}\)
so sánh giá trị 2 biểu thức sau:
\(\left(4-\dfrac{12}{5}\right):\left(3-\dfrac{9}{5}\right)\)và \(4:\dfrac{12}{5}-3:\dfrac{9}{5}\)
1. Tính bằng cách thuận tiện nhất:
\(\dfrac{2}{5}x\dfrac{12}{3}+\dfrac{2}{5}x\dfrac{15}{3}+\dfrac{2}{5}\)
2. Tìm số tự nhiên a, biết: \(\dfrac{3}{4}< a< \dfrac{11}{4}\)
A,\(\dfrac{3}{5}+\dfrac{1}{6}\)
B,\(4+\dfrac{2}{5}\)
C,\(\dfrac{25}{12}-\dfrac{7}{6}\)
D,\(\dfrac{9}{7}-\dfrac{7}{6}\)
E,\(\dfrac{3}{7}\) x \(\dfrac{2}{5}\)
a. 4+\(\dfrac{5}{9}\) b. \(\dfrac{8}{3}\)\(-2\) c. \(\dfrac{5}{12}\times\dfrac{4}{15}\) d.\(5:\dfrac{15}{8}\)
a.\(4+\dfrac{5}{9}\) b.\(\dfrac{8}{3}-2\) c.\(\dfrac{5}{12}\times\dfrac{4}{15}\) d.\(5:\dfrac{15}{8}\)