Các câu hỏi tương tự
giải cho mình 2 bài toán này nha , ai nhanh mình tik cho !
tính nhanh : nhưng ra từng bước nha , ai nhanh mink tik
1) C = (\(\frac{21}{31}\)+\(\frac{-16}{7}\)) +(\(\frac{-44}{33}\)+\(\frac{10}{31}\)) +\(\frac{9}{53}\)
Tính hợp lí:
a, \(\frac{-3}{4}+\frac{3}{7}+\frac{-1}{4}+\frac{4}{9}+\frac{4}{7}\)
b, \(\frac{-7}{9}.\frac{4}{11}+\frac{-7}{9}.\frac{7}{11}+5\frac{7}{9}\)
c,\(\left(\frac{21}{31}+\frac{2013}{6039}\right)-\left(\frac{44}{53}-\frac{10}{31}\right)-\frac{9}{53}\)
giúp mik vs mik cần gấp lắm
Tính hợp lí
\(A=\left(\frac{21}{31}+\frac{-16}{7}\right)+\left(\frac{44}{53}+\frac{10}{21}\right)+\frac{9}{53}\)
\(B=\frac{6}{15.18}+\frac{6}{18.21}+...+\frac{6}{87.90}\)
\(\frac{21}{31}+\frac{2013}{6039}-\frac{44}{53}-\frac{10}{31}-\frac{9}{53}\)
\(\left(\frac{21}{31}+\frac{2013}{6039}\right)-\left(\frac{44}{53}-\frac{10}{31}\right)-\frac{9}{53}\)
Thực hiện phép tính
Tinh bang cach hop li
a) \(\left(\frac{1}{4}+\frac{-5}{13}\right)\)+ \(\left(\frac{2}{11}+\frac{-8}{13}+\frac{3}{4}\right)\)
b)\(\left(\frac{21}{31}+\frac{-16}{7}\right)\)+\(\left(\frac{44}{53}+\frac{10}{31}\right)+\frac{9}{53}\)
16 tính bằng cách hợp lí a) ( frac{1}{4}+ frac{-5}{13}) + ( frac{2}{11}+frac{-8}{13}+frac{3}{4})b) ( frac{21}{31}+frac{-16}{7}) +( frac{44}{53}+ frac{10}{31}) +frac{9}{53}c) frac{-5}{7}+frac{3}{4}+frac{-1}{5}+frac{-2}{7}+frac{1}{4}d) frac{-3}{31}+frac{-6}{17}+frac{1}{25}+frac{-28}{31}+frac{-11}{17}+frac{-1}{5}
Đọc tiếp
16 tính bằng cách hợp lí
a) ( \(\frac{1}{4}\)+ \(\frac{-5}{13}\)) + ( \(\frac{2}{11}+\frac{-8}{13}+\frac{3}{4}\))
b) ( \(\frac{21}{31}+\frac{-16}{7}\)) +( \(\frac{44}{53}\)+ \(\frac{10}{31}\)) +\(\frac{9}{53}\)
c) \(\frac{-5}{7}+\frac{3}{4}+\frac{-1}{5}+\frac{-2}{7}+\frac{1}{4}\)
d) \(\frac{-3}{31}+\frac{-6}{17}+\frac{1}{25}+\frac{-28}{31}+\frac{-11}{17}+\frac{-1}{5}\)
tính nhanh
\(\frac{1}{2}+\frac{2}{3}+\frac{3}{4}+\frac{4}{5}+\frac{5}{6}+\frac{6}{7}+\frac{7}{8}+\frac{8}{9}+\frac{9}{10}\)\(\frac{9}{10}\)
ai nhanh mik tik nha
Tính hợp lí ( nếu có thể )
a) \(\left(\frac{-3}{42}+\frac{10}{-21}-\frac{-9}{14}\right).\left(\frac{-7}{5}\right)\)
Các bn giúp mik với
Ai nhanh mik cho 3 tik