\(\frac{9}{18}\times\frac{5}{6}+\frac{2}{9}\times\frac{15}{12}\)
=\(\frac{1}{2}\times\frac{5}{6}+\frac{2}{9}\times\frac{5}{4}\)
=\(\frac{5}{12}+\frac{10}{36}\)
=\(\frac{15}{36}+\frac{10}{36}\)
=\(\frac{25}{36}\)
nhớ tk nha bạn
Tính Bằng cách thuận tiện nhất:
\(\frac{12}{14}\)+\(\frac{15}{20}\)+\(\frac{6}{7}\) +\(\frac{3}{4}\) =?
\(\frac{9}{18}\)x\(\frac{5}{6}\)+\(\frac{2}{9}\)x\(\frac{15}{12}\)=?
\(\frac{12}{9}\)x\(\frac{3}{7}\)+\(\frac{8}{3}\)x\(\frac{10}{14}\)=?
\(\frac{5}{9}\)+\(\frac{2}{7}\)+\(\frac{6}{14}\)+\(\frac{20}{18}\)=?
Ai trả lời đúng mik tick cho !
bài 1 : tính phân số:
a) \(\frac{5}{7}+\frac{4}{9}=?;\frac{4}{5}-\frac{2}{3}=?;\frac{9}{11}+\frac{3}{8}=?;\frac{16}{25}-\frac{2}{5}=?\)=?
b)\(5+\frac{3}{5}=?;10-\frac{9}{16}=?;\frac{2}{3}-\left(\frac{1}{6}+\frac{1}{8}\right)=?\)
c)\(\frac{5}{7}+\frac{7}{6}=?;\frac{7}{12}+\frac{17}{18}=?;\frac{9}{8}+\frac{15}{32}=?;4+\frac{35}{45}=?\)
d)\(\frac{11}{4}-\frac{15}{16}=?;\frac{5}{6}-\frac{5}{8}=?;\frac{196}{64}-2=?;3-\frac{13}{9}=?\)
e)\(\frac{8}{5}+\frac{7}{6}+\frac{5}{9}-2=?;3-\frac{5}{6}-\frac{4}{9}+\frac{32}{24}=?\)
Đúng ghi Đ, sai ghi S vào chỗ chấm:
a) \(\frac{3}{7}+\frac{1}{3}x\frac{3}{7}=\frac{16}{21}x\frac{3}{7}=\frac{16}{49}\) ......
b)\(\frac{5}{9}+\frac{1}{5}x\frac{5}{6}=\frac{5}{9}x\frac{1}{6}=\frac{13}{18}\) ......
c)\(\frac{13}{9}-\frac{7}{9}:\frac{2}{3}=\frac{6}{9}:\frac{3}{2}=1\) ......
d)\(\frac{11}{8}-\frac{5}{8}:\frac{3}{4}=\frac{11}{8}-\frac{5}{8}x\frac{4}{3}=\frac{11}{8}-\frac{10}{24}=\frac{23}{24}\) ......
tính bằng hai cách
a) \(\left(\frac{6}{11}+\frac{5}{11}\right)x\frac{3}{7}\) b) \(\frac{3}{5}x\frac{7}{9}+\frac{3}{5}x\frac{2}{9}\)
c) \(\left(\frac{6}{7}-\frac{4}{7}\right):\frac{2}{5}\) d) \(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}\)
giúp mik nha
tìm x\(\frac{15}{17}x\frac{51}{5}< X< \frac{67}{9}+\frac{35}{9}\)
Giúp mình nhé : Tính bằng 2 cách :
\(a,\left(\frac{6}{11}+\frac{5}{11}\right)x\frac{3}{7}\)
\(b,\frac{3}{5}x\frac{7}{9}+\frac{3}{5}x\frac{2}{9}\)
a. X + \(\frac{5}{7}=\frac{12}{14}\)
b. X\(\frac{2}{9}xX=\frac{3}{9}\)
tính
\(\frac{18}{15}-\frac{85}{100}+\frac{42}{10}+\frac{18}{9}\)\(-\frac{12}{16}\)
\(\frac{4}{5}+\frac{3}{15}+\frac{32}{64}+\frac{12}{24}+\frac{3}{6}+\frac{2}{12}+\frac{18}{36}=...\)
Tính nhanh : ...
Toán cực dễ 5 người nhanh và đúng nhất me tik !
