Violympic toán 6
Các câu hỏi tương tự
\(A=\left(\dfrac{1}{7}+\dfrac{1}{23}-\dfrac{1}{1009}\right):\left(\dfrac{1}{23}+\dfrac{1}{7}-\dfrac{1}{1009}+\dfrac{1}{7}.\dfrac{1}{23}.\dfrac{1}{1009}\right)+1:\left(30.1009-160\right)\)
1.thực hiện phép tính
a.frac{-1}{12}-left(2^5_8-frac{1}{3}right)
b.-1,75-left(frac{-1}{9}-2^1_{18}right)
c.frac{2}{5}+frac{-4}{3}+frac{-1}{2}
d.frac{3}{12}-left(frac{6}{15}-frac{3}{10}right)
e.left(8^5_{11}+3^5_8right)-3^5_{11}
f.frac{4}{9}:left(frac{-1}{7}right)+6^5_9:left(frac{-1}{7}right)
g.frac{-1}{4}.13^9_{11}-0,25.6^2_{11}
h.5^{27}_5+frac{27}{23}+0,5-frac{5}{27}+frac{16}{23}
i.frac{3}{8}.27^1_5-51^1_5.frac{3}{8}+19
Đọc tiếp
1.thực hiện phép tính
a.\(\frac{-1}{12}-\left(2^5_8-\frac{1}{3}\right)\)
b.-1,75-\(\left(\frac{-1}{9}-2^1_{18}\right)\)
c.\(\frac{2}{5}+\frac{-4}{3}+\frac{-1}{2}\)
d.\(\frac{3}{12}-\left(\frac{6}{15}-\frac{3}{10}\right)\)
e.\(\left(8^5_{11}+3^5_8\right)-3^5_{11}\)
f.\(\frac{4}{9}:\left(\frac{-1}{7}\right)+6^5_9:\left(\frac{-1}{7}\right)\)
g.\(\frac{-1}{4}.13^9_{11}-0,25.6^2_{11}\)
h.\(5^{27}_5+\frac{27}{23}+0,5-\frac{5}{27}+\frac{16}{23}\)
i.\(\frac{3}{8}.27^1_5-51^1_5.\frac{3}{8}+19\)
2,Thực hiện phép tính(tính nhanh nếu có thể)
a,frac{2}{3}+frac{1}{3}cdotleft(-frac{2}{5}right)
b,0,75cdot1frac{7}{9}-1frac{2}{5}:frac{-21}{20}
c,frac{-2}{17}+frac{15}{23}+frac{15}{-17}-frac{-4}{19}+frac{8}{23}
d,2019^0cdotleft(6-2frac{4}{5}right)cdot3frac{1}{8}-1frac{3}{5}:25phần trăm
e,left(frac{7}{8}-frac{1}{2}right)cdot2frac{2}{3}-frac{3}{7}cdotleft(2,5^2right)
Đọc tiếp
2,Thực hiện phép tính(tính nhanh nếu có thể)
a,\(\frac{2}{3}+\frac{1}{3}\cdot\left(-\frac{2}{5}\right)\)
b,\(0,75\cdot1\frac{7}{9}-1\frac{2}{5}:\frac{-21}{20}\)
c,\(\frac{-2}{17}+\frac{15}{23}+\frac{15}{-17}-\frac{-4}{19}+\frac{8}{23}\)
d,\(2019^0\cdot\left(6-2\frac{4}{5}\right)\cdot3\frac{1}{8}-1\frac{3}{5}:25\)phần trăm
e,\(\left(\frac{7}{8}-\frac{1}{2}\right)\cdot2\frac{2}{3}-\frac{3}{7}\cdot\left(2,5^2\right)\)
\(\left(-\frac{1}{2}\right)+\left(-\frac{1}{9}\right)-\left(-\frac{3}{5}\right)+\frac{1}{2006}-\left(-\frac{2}{7}\right)\)
\(C=\left(\frac{2}{3}-\frac{1}{4}+\frac{5}{11}\right):\left(\frac{5}{12}+1-\frac{7}{11}\right)\)
\(D=1\frac{1}{3}+\frac{1}{8}:\left(0,75-\frac{1}{2}\right)-\frac{25}{100}.\frac{1}{2}\)
\(E=\left(-\frac{1}{2}\right)^2-\left(-2\right)^2-5^0\)
tim x
\(\left(\frac{1}{1.2.3}+\frac{1}{2.3.4}+......+\frac{1}{8.9.10}\right).x=\frac{23}{45}\)
Tính bằng cách thuận tiện :
1) \(\frac{2}{3}+\left(\frac{5}{14}+\frac{-25}{23}\right)-\left(\frac{-2}{23}-\frac{9}{14}\right)\)
left(20+9frac{1}{4}right):2frac{1}{4} left(6-2frac{4}{5}right).3frac{1}{8}-1frac{3}{5}:frac{1}{4}
frac{32}{15}:left(-1frac{1}{5}+1frac{1}{3}right) 0,2.frac{15}{36}-left(frac{2}{5}frac{2}{3}right):1frac{1}{5}
frac{-3}{7}.frac{5}{9}+frac{4}{9}.frac{-3}{7}+2frac{3}{7} 0,7.2frac{2}{3}.20.0,375.frac{5}{8}
Đọc tiếp
\(\left(20+9\frac{1}{4}\right):2\frac{1}{4}\) \(\left(6-2\frac{4}{5}\right).3\frac{1}{8}-1\frac{3}{5}:\frac{1}{4}\)
\(\frac{32}{15}:\left(-1\frac{1}{5}+1\frac{1}{3}\right)\) \(0,2.\frac{15}{36}-\left(\frac{2}{5}=\frac{2}{3}\right):1\frac{1}{5}\)
\(\frac{-3}{7}.\frac{5}{9}+\frac{4}{9}.\frac{-3}{7}+2\frac{3}{7}\) \(0,7.2\frac{2}{3}.20.0,375.\frac{5}{8}\)
a,1frac{13}{15}.0,75-left(frac{8}{15}+0,25right).frac{24}{47}
b,5:left(4frac{3}{4}-1frac{25}{28}right)-1frac{3}{8}:left(frac{3}{8}+frac{9}{20}right)
c,6frac{5}{12}:2frac{3}{4}+11frac{1}{4}.left(frac{1}{3}-frac{1}{5}right)
d,left(frac{3}{5}+0,415-frac{3}{200}right).2frac{2}{3}.0,25
e,left(frac{3}{8}+frac{-3}{4}+frac{7}{12}right):frac{5}{6}+frac{1}{2}
g,1frac{13}{15}.0,75-left(frac{11}{20}+25%right);frac{7}{3}
Đọc tiếp
\(a,1\frac{13}{15}.0,75-\left(\frac{8}{15}+0,25\right).\frac{24}{47}\)
\(b,5:\left(4\frac{3}{4}-1\frac{25}{28}\right)-1\frac{3}{8}:\left(\frac{3}{8}+\frac{9}{20}\right)\)
\(c,6\frac{5}{12}:2\frac{3}{4}+11\frac{1}{4}.\left(\frac{1}{3}-\frac{1}{5}\right)\)
\(d,\left(\frac{3}{5}+0,415-\frac{3}{200}\right).2\frac{2}{3}.0,25\)
\(e,\left(\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)
\(g,1\frac{13}{15}.0,75-\left(\frac{11}{20}+25\%\right);\frac{7}{3}\)