9 / 2 + 6-9
=21/2 - 9
=3/2
ủng hộ mik lên 0 điểm nha!
9/2+6-9=9/2+12/2-9=21/2-9=21/2-18/2=3/2
9/2+6-9=9/2+6/1-9/1=9/2+12/2-18/2=21/2-18/2=3/2=\(1\frac{1}{2}\)
9 / 2 + 6-9
=21/2 - 9
=3/2
ủng hộ mik lên 0 điểm nha!
9/2+6-9=9/2+12/2-9=21/2-9=21/2-18/2=3/2
9/2+6-9=9/2+6/1-9/1=9/2+12/2-18/2=21/2-18/2=3/2=\(1\frac{1}{2}\)
Thực hiện phép tính
a, \(\frac{2}{3}+\frac{1}{3}.\left(\frac{-4}{9}+\frac{5}{6}\right):\frac{7}{12}\)
b, \(\frac{5}{9}.\frac{8}{11}+\frac{5}{9}.\frac{9}{11}-\frac{5}{9}.\frac{6}{11}\)
Tính nhanh nếu có thể......\(9\frac{2}{9}+\frac{2}{3}+7\frac{7}{9}\) \(\frac{5}{9}\times\frac{10}{11}+\frac{5}{9}\times\frac{14}{11}-\frac{5}{9}\times\frac{15}{11}\)
\(\frac{1}{6}\div\left(0,75+\frac{1}{6}\right)-50\%-\left(1\right)^2\)
Tính nhanh:
\(N=\frac{1}{6}.\frac{5}{9}+\frac{5}{9}.\frac{2}{7}+\frac{1}{9}.\frac{5}{7}-\frac{5}{9}.\frac{3}{7}\)
Tính giá trị biểu thức
a,\(A=\frac{24\cdot47-23}{24+47-23}\cdot\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
b,\(M=\frac{1+2+2^2+2^3+...+2^{2012}}{2^{2014}-2}\)
c,\(A=81\cdot\left[\frac{12-\frac{12}{7}-\frac{12}{289}-\frac{12}{85}}{4-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}}:\frac{5+\frac{5}{13}+\frac{5}{169}+\frac{5}{91}}{6+\frac{6}{13}+\frac{6}{169}+\frac{6}{91}}\right]:\frac{158158158}{711711711}\)
d,\(A=\frac{5\cdot\left(2^2.3^2\right)^9\cdot\left(2^2\right)^6-2\cdot\left(2^2\cdot3\right)^{14}\cdot3^4}{5\cdot2^{28}\cdot3^{18}-7\cdot2^{29}\cdot3^{18}}\)
\(S=\frac{1}{2}:\frac{3}{2}:\frac{4}{3}:\frac{5}{4}:\frac{6}{5}:\frac{7}{6}:\frac{8}{7}:\frac{9}{8}:\frac{10}{9}\)
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
\(\left(\frac{1}{9}-\frac{1}{9^9}-\frac{1}{9^{99}}\right)\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)=?
\(\frac{11^4.6-11^5}{11^4-11^5}:\frac{9^8.3-9^9}{9^8.5+9^8.7}\)
\(\frac{3}{5}:\left(\frac{-1}{5}-\frac{1}{6}\right)+\frac{3}{5}:\left(\frac{-1}{3}-1\frac{1}{15}\right)\)
\(\left(\frac{1}{2}-\frac{13}{14}\right):\frac{5}{7}-\left(-\frac{2}{21}+\frac{1}{7}\right):\frac{5}{7}\)
\(\frac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
\(\frac{3-\frac{1}{5}+\frac{1}{7}+\frac{1}{9}}{6-\frac{2}{5}+\frac{2}{7}+\frac{2}{9}}\)
Tinh nhanh
c) P = \(\frac{6}{7}.\frac{8}{13}-\frac{6}{9}.\frac{9}{7}+\frac{5}{13}.\frac{6}{7}\)
d) Q = \(\frac{-9}{25}.\frac{53}{3}-\left(\frac{3}{5}\right)^2.\frac{22}{3}\)