Các câu hỏi tương tự
Bài: Tính theo cách hợp lí:
a) \(\frac{4}{20}+\frac{16}{42}+\frac{6}{15}+\frac{-3}{5}+\frac{2}{21}+\frac{-10}{21}+\frac{3}{20}\)
b) \(\frac{42}{46}+\frac{250}{186}+\frac{-2121}{2323}+\frac{-125125}{143143}\)
Bài 1: Tính theo cách hợp lí:a/frac{4}{20}+frac{16}{42}+frac{6}{15}+frac{-3}{5}+frac{2}{21}+frac{-10}{21}+frac{3}{20}b/frac{42}{46}+frac{250}{186}+frac{-2121}{2323}+frac{-125125}{143143}Bài 2:Tính tổng các phân số sau:a/ frac{1}{1.2}+frac{1}{2.3}+frac{1}{3.4}+...+frac{1}{2003.2004}b/frac{1}{1.3}+frac{1}{3.5}+frac{1}{5.7}+...+frac{1}{2003.2005}
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Bài 1: Tính theo cách hợp lí:
a/\(\frac{4}{20}+\frac{16}{42}+\frac{6}{15}+\frac{-3}{5}+\frac{2}{21}+\frac{-10}{21}+\frac{3}{20}\)
b/\(\frac{42}{46}+\frac{250}{186}+\frac{-2121}{2323}+\frac{-125125}{143143}\)
Bài 2:Tính tổng các phân số sau:
a/ \(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{2003.2004}\)
b/\(\frac{1}{1.3}+\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{2003.2005}\)
Tính
\(\frac{4}{20}+\frac{16}{42}+\frac{6}{15}+\frac{-3}{5}+\frac{2}{21}+\frac{-10}{21}+\frac{3}{10}\)
\(\frac{42}{46}+\frac{250}{186}+\frac{-2121}{2323}+\frac{-125125}{143143}\)
a) \(\frac{5}{9}+\frac{x}{-1}=\frac{-1}{3}\)
2. tính theo cách hợp lý
a) \(\frac{4}{20}+\frac{16}{42}+\frac{6}{15}+\frac{-3}{15}+\frac{2}{21}+\frac{-10}{21}+\frac{3}{20}\)
b) \(\frac{42}{46}+\frac{250}{186}+\frac{-2121}{2323}+\frac{-125125}{143143}\)
giúp mih với nha.sẽ nhận đc nhìu like lém đó. help me
tính hợp lí ( nếu có thể )
a) \(\frac{-5}{2}+\frac{1}{7}+\frac{6}{7}+\frac{1}{2}+\frac{3}{4}\)
b) \(\frac{4}{10}+\frac{-2}{9}+\frac{-3}{-5}+\frac{21}{-27}+\frac{-10}{20}\)
tính giá trị biểu thứcAfrac{-378.132+189.64}{15+18+21+......+45+48}B1,4.frac{15}{14}-left(frac{4}{5}+frac{2}{5}right):2frac{1}{5}-frac{frac{73}{77}+frac{73}{165}+frac{73}{285}}{frac{25}{24}+frac{15}{180}+frac{20}{285}}Cfrac{7+frac{7}{12}-frac{7}{144}+frac{7}{60}}{5+frac{6}{12}-frac{5}{144}}.frac{frac{3}{4}-frac{3}{16}+frac{3}{64}-frac{3}{256}}{1-frac{1}{4}+frac{1}{16}-frac{1}{34}}-frac{1}{20}
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tính giá trị biểu thức
\(A=\frac{-378.132+189.64}{15+18+21+......+45+48}\)
\(B=1,4.\frac{15}{14}-\left(\frac{4}{5}+\frac{2}{5}\right):2\frac{1}{5}-\frac{\frac{73}{77}+\frac{73}{165}+\frac{73}{285}}{\frac{25}{24}+\frac{15}{180}+\frac{20}{285}}\)
\(C=\frac{7+\frac{7}{12}-\frac{7}{144}+\frac{7}{60}}{5+\frac{6}{12}-\frac{5}{144}}.\frac{\frac{3}{4}-\frac{3}{16}+\frac{3}{64}-\frac{3}{256}}{1-\frac{1}{4}+\frac{1}{16}-\frac{1}{34}}-\frac{1}{20}\)
TÍnh hợp lí:a.frac{4}{20}+ frac{16}{42}+ frac{6}{15}+ frac{-3}{5}+ frac{2}{21}+ frac{-10}{21}+ frac{3}{20}b. frac{42}{46}+ frac{250}{186}+ frac{-2121}{2323}+ frac{-125125}{143143}c. frac{5}{6}+ frac{3}{5}: 3 - frac{4}{27}. (-3)2 d. 2frac{2}{3}. 0,25 . (0,415- frac{3}{200}+ frac{3}{5})e. frac{3}{5}- frac{-7}{10}- frac{13}{-20}+ frac{1}{20}g. frac{-7}{9}. frac{3}{13}+ frac{-7}{9}. frac{10}{13}+ 1frac{7}{9}
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TÍnh hợp lí:
a.\(\frac{4}{20}\)+ \(\frac{16}{42}\)+ \(\frac{6}{15}\)+ \(\frac{-3}{5}\)+ \(\frac{2}{21}\)+ \(\frac{-10}{21}\)+ \(\frac{3}{20}\)
b. \(\frac{42}{46}\)+ \(\frac{250}{186}\)+ \(\frac{-2121}{2323}\)+ \(\frac{-125125}{143143}\)
c. \(\frac{5}{6}\)+ \(\frac{3}{5}\): 3 - \(\frac{4}{27}\). (-3)2
d. 2\(\frac{2}{3}\). 0,25 . (0,415- \(\frac{3}{200}\)+ \(\frac{3}{5}\))
e. \(\frac{3}{5}\)- \(\frac{-7}{10}\)- \(\frac{13}{-20}\)+ \(\frac{1}{20}\)
g. \(\frac{-7}{9}\). \(\frac{3}{13}\)+ \(\frac{-7}{9}\). \(\frac{10}{13}\)+ 1\(\frac{7}{9}\)
tính giá trị:
A=\(\frac{5}{6}-\frac{-1}{12}+\frac{2}{3}-\frac{-2}{7}+\frac{1}{25}-\frac{-1}{4}-\frac{5}{42}\)
B=\(\frac{7.6^{10}.2^{20}.3^6-2^{19}.6^{15}}{9.6^{19}.2^9-4.3^{17}2^{26}}\)
Tính hợp lí
a) \(\left(4\frac{5}{37}-3\frac{4}{5}+8\frac{15}{29}\right)-\left(3\frac{5}{37}-6\frac{14}{29}\right)\)
b) \(\left(\frac{7}{20}+\frac{11}{15}-\frac{15}{12}\right):\left(\frac{11}{20}-\frac{26}{45}\right)\)