Số cần tìm là :
5/2 * 6/9 = 30/18
Đ / S : 30/18
\(\frac{5}{2}x\frac{6}{9}=\frac{5x6}{2x9}=\frac{30}{18}=\frac{15}{9}\)
\(\frac{5}{2}x\frac{6}{9}=\frac{30}{18}:3=\frac{10}{6}:2=\frac{5}{3}\)
\(\frac{30}{18}=\frac{5}{3}\)
Số cần tìm là :
5/2 * 6/9 = 30/18
Đ / S : 30/18
\(\frac{5}{2}x\frac{6}{9}=\frac{5x6}{2x9}=\frac{30}{18}=\frac{15}{9}\)
\(\frac{5}{2}x\frac{6}{9}=\frac{30}{18}:3=\frac{10}{6}:2=\frac{5}{3}\)
\(\frac{30}{18}=\frac{5}{3}\)
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)\(\frac{11}{8}-\frac{5}{8}:\frac{3}{4}=\frac{11}{8}-\frac{5}{8}x\frac{4}{3}=\frac{11}{8}-\frac{10}{24}=\frac{23}{24}\) ......
Giúp mình nhé : Tính bằng 2 cách :
\(a,\left(\frac{6}{11}+\frac{5}{11}\right)x\frac{3}{7}\)
\(b,\frac{3}{5}x\frac{7}{9}+\frac{3}{5}x\frac{2}{9}\)
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)\(\frac{8}{5}+\frac{7}{6}+\frac{5}{9}-2=?;3-\frac{5}{6}-\frac{4}{9}+\frac{32}{24}=?\)
1. Tính nhanh
\(\frac{1}{2}\)x \(\frac{2}{3}\)x \(\frac{3}{4}\)x\(\frac{4}{5}\)x \(\frac{5}{6}\)x\(\frac{6}{7}\)x \(\frac{6}{7}\)x \(\frac{7}{8}\)x\(\frac{8}{9}\text{ }\)x \(\frac{9}{10}\)
\(\frac{1}{2}\): \(\frac{3}{2}\): \(\frac{5}{4}\)\(\frac{6}{5}\):\(\frac{7}{6}\):\(\frac{8}{7}\)
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
\(\frac{5}{9}x\frac{9}{6}x\frac{7}{3}x\frac{6}{5}x\frac{3}{8}\)=
người nào giải nhanh và đúng nhất tớ sẻ tích
\(\frac{9}{18}\)x\(\frac{5}{6}\)+\(\frac{2}{9}\)x\(\frac{15}{12}\)=?
x+\(\frac{3}{4}=\frac{5}{3}\) \(\frac{7}{5}:x=3\)\(2-x=\frac{4}{7}\)\(\frac{5}{6}\)x \(x=\frac{4}{9}\)
1 tính
3 + \(\frac{2}{5}\)- \(\frac{3}{4}\)x\(\frac{4}{5}\)
5 - \(\frac{7}{9}\) + \(\frac{2}{3}\)-\(\frac{5}{6}\): \(\frac{4}{9}\)
\(5\frac{1}{5}\)+ \(\frac{4}{5}\) : ( 2 - \(\frac{2}{3}\) ) x 3