\(\frac{2}{9}\)+ \(\frac{-2}{9}\) x\(\frac{2}{9}\):\(\frac{14}{81}\)
= \(\left(\frac{2}{9}+\frac{-2}{9}\right)\) x \(\frac{2}{9}\): \(\frac{14}{81}\)
= 0 x \(\frac{2}{9}\): \(\frac{14}{81}\)
= 0
CHÚC BẠN HỌC TỐT
\(\frac{2}{9}\)+ \(\frac{-2}{9}\) x\(\frac{2}{9}\):\(\frac{14}{81}\)
= \(\left(\frac{2}{9}+\frac{-2}{9}\right)\) x \(\frac{2}{9}\): \(\frac{14}{81}\)
= 0 x \(\frac{2}{9}\): \(\frac{14}{81}\)
= 0
CHÚC BẠN HỌC TỐT
\(\frac{2}{3}+\frac{2}{9}+\frac{2}{27}+\frac{2}{81}+\frac{2}{243}=\)
a. X + \(\frac{5}{7}=\frac{12}{14}\)
b. X\(\frac{2}{9}xX=\frac{3}{9}\)
1.Tính bằng 2 cách:
a,\(\left(\frac{5}{7}+\frac{9}{7}\right)x\frac{21}{28}\) b,\(\frac{4}{5}x\frac{13}{14}+\frac{13}{14}x\frac{1}{5}\)
Tính giá trị biểu thức
\(\frac{1}{10}+\frac{2}{20}+\frac{9}{30}+\frac{16}{40}+\frac{25}{50}+\frac{36}{60}+\frac{49}{70}+\frac{69}{80}+\frac{81}{90}\)
So sánh hai phân số:
\(\frac{6}{5}and\frac{5}{6}\);\(\frac{8}{9}and\frac{21}{81}\);\(\frac{9}{63}and\frac{90}{7}\);\(\frac{8}{81}and\frac{10}{9}\)
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 !
TÍNH GIÁ TRỊ BIỂU THỨC:\(\frac{2}{6}+\frac{4}{14}+\frac{22}{12}+16+\frac{2}{9}\)
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 cách thuận tiện
a) \(\frac{3}{5}+\frac{4}{7}+\frac{2}{5}+\frac{1}{7}+\frac{2}{7}\) b) \(\frac{4}{9}+\frac{8}{9}+\frac{12}{9}+\frac{16}{9}+........+\frac{48}{9}+\frac{52}{9}+\frac{56}{9}\)
giúp mình với ai nhanh mình thưởng cho 2 tick