\(\dfrac{7}{12}+\dfrac{1}{5}\times7\)
\(=\dfrac{7}{12}+\dfrac{7}{5}\)
\(=\dfrac{35}{60}+\dfrac{84}{60}\)
\(=\dfrac{119}{60}\)
= 7/12 + 7/5 = 35/60 + 84/60 = 119/60
\(\dfrac{7}{12}+\dfrac{1}{5}\times7\)
\(=\dfrac{7}{12}+\dfrac{7}{5}\)
\(=\dfrac{35}{60}+\dfrac{84}{60}\)
\(=\dfrac{119}{60}\)
= 7/12 + 7/5 = 35/60 + 84/60 = 119/60
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 \(\dfrac{2}{5}\)
Tính bằng cách thuận tiện nhất:
a) 60 x (\(\dfrac{7}{12}\) + \(\dfrac{4}{15}\))
b) \(\dfrac{1}{2}\) x \(\dfrac{2}{3}\) x \(\dfrac{3}{4}\) x \(\dfrac{4}{5}\) x \(\dfrac{5}{6}\) x \(\dfrac{6}{7}\) x \(\dfrac{7}{8}\) x \(\dfrac{8}{9}\)
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
a,\(\dfrac{2}{9}+\dfrac{1}{6}\)
b,\(\dfrac{5}{6}-\dfrac{4}{7}\)
c,\(\dfrac{3}{8}\)x\(\dfrac{6}{15}\)
d,\(\dfrac{7}{12}:\dfrac{4}{7}\)
e,\(\dfrac{4}{7}:3\)
Điền dấu > ; < hoặc = vào chỗ chấm cho thích hợp:
a) \(\dfrac{3}{4}.....\dfrac{4}{5}\) b) \(\dfrac{11}{12}.....\dfrac{7}{8}\) c) \(\dfrac{5}{7}+\dfrac{3}{5}.....\dfrac{6}{7}:\dfrac{5}{8}\) d) \(\dfrac{9}{16}-\dfrac{5}{9}.....\dfrac{1}{16}x\dfrac{1}{9}\)
\(\dfrac{4}{5}+\dfrac{1}{10}\)
\(\dfrac{7}{12}\) \(-\) \(\dfrac{1}{4}\)
5 x \(\dfrac{4}{15}\)
\(\dfrac{2}{5}:\dfrac{6}{5}\)
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) \(\dfrac{1}{4}x\dfrac{5}{12}+\dfrac{5}{12}x\dfrac{4}{5}\)
a,\(x\)\(+\)\(\dfrac{4}{5}\)=\(\dfrac{45}{4}\)\(-\)\((\)\(\dfrac{7}{5}\)+\(\dfrac{3}{5}\)\()\)
b,\(\dfrac{5}{7}\)+\(\dfrac{x}{35}\)=\(\dfrac{4}{5}\)
12:05
\(\dfrac{3}{7}\) x 2
\(\dfrac{5}{12}\) x 1
3 x \(\dfrac{4}{7}\)
0 x \(\dfrac{5}{9}\)
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