bài này dễ nhưng làm biếng k mun làm bn chỉ cần tìm mẫu số chung là làm đc mà
giống như nguyễn như ý bài này dễ như ăn cháo ấy chỉ cần tìm mẫu số chung là ok
Tinhs giá trị biểu thức ::
a) 8,3 x 39 - 2,93 x 500 + 19,3 x 20
b) \(3\frac{3}{2}\times\frac{3}{17}+\frac{4}{9}\times\frac{27}{8}-\frac{1}{3}\)
c)9,31 : 6 + 13,8 : 6 -5,11 : 6
d) \(\frac{19,8\div0,2\times44,44\div0,5\times13,2\div0,25}{3,3\times88,88\div0,5\times6,6\div0,125\times5}\)
e) \(\frac{5}{1.6}+\frac{5}{6.11}+...+\frac{5}{501.506}\)
f) \(\frac{\frac{4}{7}+\frac{12}{13}+\frac{16}{17}-\frac{8}{27}}{\frac{5}{21}+\frac{15}{39}+\frac{20}{51}-\frac{10}{81}}\)
Tính nhanh:
a)\(\frac{5}{30}+\frac{15}{90}+\frac{25}{150}+\frac{35}{210}+\frac{45}{270}\)
b)\(\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+...+\frac{1}{56}\)
c)\(\frac{1}{15}+\frac{4}{30}+\frac{2}{45}+\frac{16}{60}+\frac{25}{75}+\frac{36}{90}+\frac{49}{105}+\frac{64}{120}+\frac{81}{135}\)
Tính bằng cách thuận tiện nhất:
\(\frac{1}{10}+\frac{2}{20}+\frac{3}{30}+\frac{4}{40}+\frac{5}{50}+\frac{6}{60}+\frac{7}{70}+\frac{8}{80}+\frac{9}{90}\)
tính bằng cách thuận tiện
\(\frac{1}{10}+\frac{2}{20}+\frac{3}{30}+\frac{4}{40}+\frac{5}{50}+\frac{6}{60}+\frac{7}{70}+\frac{8}{80}+\frac{9}{90}\)
=...........................................................................................................................
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Bài 1 : Tính
a)\(5+\frac{3}{5}\)
b)\(10-\frac{9}{16}\)
c)\(\frac{2}{3}-\left(\frac{1}{6}+\frac{1}{8}\right)\)
d)\(\frac{15}{16}:\frac{25}{24}\)
e)\(14x\frac{5}{21}\)
g)\(\frac{5}{3}:10\)
h)\(10:\frac{5}{3}\)
Bài 2 :
a)\(\frac{9}{22}x\frac{33}{18}\)
b)\(\frac{12}{35}:\frac{36}{25}\)
c)\(\frac{19}{17}:\frac{76}{51}\)
tính phân số
a)\(\frac{9}{8}+\frac{15}{32}=?\)
b)\(4+\frac{35}{45}=?\)
c)\(\frac{11}{4}-\frac{15}{16}=?\)
d)\(3-\frac{13}{9}=?\)
e)\(\frac{5}{6}-\frac{5}{8}=?\)
g)\(\frac{196}{64}-2\)
sắp xếp các phân số sau theo thứ tự từ bé đến lớn :
a ) \(\frac{7}{10}\ ,\ \frac{10}{13}\ ,\ \)\(\frac{4}{7}\ ,\ \frac{1}{4}\ ,\ \frac{13}{16}\ ,\ \frac{16}{19}\ .\)
b ) \(\frac{13}{10}\ ,\ \frac{17}{14}\ ,\ \frac{11}{8}\ ,\ \frac{8}{5}\ ,\ \frac{18}{15}\ ,\ \frac{21}{18}\)
a ) \(\frac{5}{6}-\frac{26}{5}\times\frac{1}{13}\)
b ) \(\subset\frac{19}{23}-\frac{22}{46}\supset\times\frac{23}{16}\)
c ) \(\frac{25}{8}\times\frac{14}{30}\)
d ) \(\subset\frac{3}{4}\times\frac{5}{7}\supset\times\subset\frac{20}{9}\times\frac{14}{15}\supset\)
e ) \(\frac{4}{35}\times\frac{25}{32}\times\frac{38}{24}\)
g ) \(\frac{1}{2}\times\frac{3}{4}\times\frac{2}{3}\times\frac{4}{5}\)
h ) \(\frac{5}{6}\times\frac{11}{4}-\frac{5}{4}\times\frac{23}{6}\)
i ) \(\frac{9}{16}\times\frac{13}{4}-\frac{9}{4}\times\frac{5}{16}+\frac{9}{16}\times\frac{17}{4}\)
k ) \(\subset7\times\frac{1}{3}\supset\times\subset\frac{1}{7}\times6\supset\)
m ) \(\frac{2}{3}\times\subset\frac{3}{5}+\frac{3}{7}\supset\)
n ) \(\frac{4}{5}\times\subset\frac{5}{8}+\frac{7}{4}\supset\)
p )\(\subset\frac{1}{33}+\frac{31}{333}-\frac{341}{3333}\supset\times\subset\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\supset\)
So sánh \(A\)với\(13\),biết rằng:
\(A=\frac{13}{15}+\frac{7}{5}+\frac{3}{4}+\frac{1}{5}+\frac{1}{7}+\frac{19}{20}+\frac{5}{4}+\frac{1}{3}+\frac{1}{6}+\frac{1}{13}+\frac{17}{23}+\frac{9}{8}+\frac{2}{5}+\frac{1}{7}+\frac{1}{25}+\frac{3}{2}+\frac{1}{8}+\frac{1}{19}+\frac{1}{9}+\frac{1}{97}\)
