\(10101.\left(\dfrac{5}{111111}+\dfrac{5}{222222}-\dfrac{4}{3.7.11.13.37}\right)\)
\(=10101.\dfrac{5}{111111}+10101.\dfrac{5}{222222}-10101.\dfrac{4}{3.7.11.13.37}\)
\(=\dfrac{5}{11}+\dfrac{5}{22}-\dfrac{4}{11}\)
\(=\dfrac{7}{22}\)
Tính nhanh:
\(M=\dfrac{120-\dfrac{1}{2}.40.5.\dfrac{1}{5}.20.\dfrac{1}{4}-20}{1+5+9+...+33+37+41}\)
\(N=10101.\left(\dfrac{6}{111111}+\dfrac{6}{222222}-\dfrac{7}{3.7.11.13.37}\right)\)
I= \(10101.\left(\dfrac{5}{111111}+\dfrac{5}{222222}-\dfrac{4}{3.7.11.13.37}\right)\)
B=\(71\dfrac{38}{45}-\left(43\dfrac{8}{45}-1\dfrac{17}{57}\right)\)
D= \(\left(19\dfrac{5}{8}:\dfrac{7}{12}-13\dfrac{1}{4}:\dfrac{7}{12}\right).\dfrac{4}{5}\)
F= \(\left(9.75.21\dfrac{3}{7}+\dfrac{39}{4}.18\dfrac{4}{7}\right).\dfrac{15}{78}\)
Giups mk vs!!!!!!!!
Tính :
a) b)
\(\dfrac{\dfrac{5}{7}+\dfrac{5}{9}+\dfrac{5}{11}}{\dfrac{25}{7}+\dfrac{25}{7}+\dfrac{25}{11}}\) \(\dfrac{4+\dfrac{4}{73}-\dfrac{4}{115}}{5+\dfrac{5}{73}-\dfrac{1}{23}}\)
Mong mọi người sẽ trả lời nhanh ai nhanh mình sẽ cho 2 like luôn
Tính nhanh
\(\dfrac{4}{7}.\dfrac{89}{5}-\dfrac{4}{5}.\dfrac{82}{7}\)
\(\dfrac{5}{7}.\dfrac{-4}{19}+\dfrac{-15}{7}.\dfrac{5}{19}\)
BT1: Tính nhanh:
6) 81. \(\dfrac{12-\dfrac{12}{7}-\dfrac{12}{289}-\dfrac{12}{85}}{4-\dfrac{4}{7}-\dfrac{4}{289}-\dfrac{4}{85}}\) : \(\dfrac{5+\dfrac{5}{13}+\dfrac{5}{169}+\dfrac{5}{91}}{6+\dfrac{6}{13}+\dfrac{6}{169}+\dfrac{6}{91}}\). \(\dfrac{158158158}{711711711}\)
BT2: Tính nhanh
5) \(\dfrac{1}{7}.\dfrac{2}{5}+\dfrac{1}{7}.\dfrac{1}{5}+\dfrac{1}{7}.\dfrac{4}{5}\)
6) \(\dfrac{-3}{7}.\dfrac{19}{11}+\dfrac{-2}{7}.\dfrac{3}{11}+4\dfrac{6}{11}\)
Tính:
a. \(\dfrac{-5}{14}-\dfrac{2}{14}+\dfrac{1}{8}+\dfrac{1}{8}\)
b.\(\dfrac{-5}{22}-1+\dfrac{3}{2}-\dfrac{6}{22}\)
c.\(\dfrac{2}{5}+\dfrac{5}{4}+(\dfrac{-2}{5}+\dfrac{5}{4})-\dfrac{5}{2}\)
d.\(\dfrac{-1}{2}+\dfrac{1}{4}+\dfrac{2}{8}-\dfrac{11}{77}\)
làm nhanh hộ mình nha!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Tính nhanh:
11) \(\dfrac{5}{7}\left(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{4}{7}\right)+\left(\dfrac{1}{3}-\dfrac{1}{2}-\dfrac{4}{7}\right):\dfrac{7}{5}\)
12)\(\dfrac{43}{5}\left(\dfrac{17}{3}-\dfrac{16}{9}+2\right)-\dfrac{43}{5}\left(\dfrac{17}{3}-\dfrac{16}{9}\right)\)
\(C=\left(\dfrac{4}{1\cdot3}\right)+\left(\dfrac{4}{3\cdot5}\right)+...+\left(\dfrac{4}{97\cdot99}\right)-\dfrac{5}{11\cdot12}-\dfrac{5}{12\cdot13}-...-\dfrac{5}{98\cdot99}\)
ok, giải nhanh cho mk nha
