Các câu hỏi tương tự
Rút gọn :
A = \(\frac{4157-19}{12471-57}\)
B = \(\frac{7}{10^2+8.10^2}\)
C = \(\frac{31995}{42660-108}\)
D = \(\frac{2^{45}.5^3.2^6.3}{8.2^{18}.81.5}\)
Ai làm đầy đủ , chi tiết , tui tk 10 lần .
Nhanh lên nhé ! 1h tui đi học rùi !
Rút gọn:
A = \(\frac{31995-81}{42660-108}\)
B = \(\frac{3.5.7.11.13.37-10101}{1212120+40404}\)
Giúp nha !
Bài tập:
a) Chứng minh rằng: A = \(\frac{1}{3^2}+\frac{1}{4^2}+\frac{1}{5^2}+......+\frac{1}{50^2}\)> \(\frac{1}{4}\)
b) Rút gọn phân số:
A = \(\frac{10.11+50.11+70.77}{11.12+55.60+77.84}\)
B = \(\frac{2^{15}.5^3.2^6.3^4}{8.2^{18}.81.5}\)
bài 1:thực hiện phép tính : a)frac{3}{7}+frac{5}{13}+frac{4}{13}b)left(frac{3}{8}+frac{-3}{4}+frac{7}{12}right):frac{5}{6}+frac{1}{2}c)frac{2}{5}.frac{1}{3}-frac{2}{15}:frac{1}{5}+frac{3}{5}.frac{1}{3}d)left(4-frac{5}{12}right):2+frac{5}{24}e)frac{7}{19}.frac{8}{11}+frac{3}{11}.frac{7}{19}+frac{-1}{19}f)frac{9}{27}+frac{8}{24}+frac{18}{27}-frac{-16}{24}+frac{2}{3}g)frac{-5}{21}+frac{-2}{21}+frac{8}{24}h)frac{-5}{9}+frac{8}{15}+frac{-2}{11}+frac{4}{-9}+frac{7}{15}i)frac{7}{25}.frac{39}{-14}.frac{...
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bài 1:thực hiện phép tính :
a)\(\frac{3}{7}+\frac{5}{13}+\frac{4}{13}\)
b)\(\left(\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)
c)\(\frac{2}{5}.\frac{1}{3}-\frac{2}{15}:\frac{1}{5}+\frac{3}{5}.\frac{1}{3}\)
d)\(\left(4-\frac{5}{12}\right):2+\frac{5}{24}\)
e)\(\frac{7}{19}.\frac{8}{11}+\frac{3}{11}.\frac{7}{19}+\frac{-1}{19}\)
f)\(\frac{9}{27}+\frac{8}{24}+\frac{18}{27}-\frac{-16}{24}+\frac{2}{3}\)
g)\(\frac{-5}{21}+\frac{-2}{21}+\frac{8}{24}\)
h)\(\frac{-5}{9}+\frac{8}{15}+\frac{-2}{11}+\frac{4}{-9}+\frac{7}{15}\)
i)\(\frac{7}{25}.\frac{39}{-14}.\frac{50}{78}\)
m.n làm nhanh cho mình nhé, chiều mình phải nộp rồi! cảm ơn m.n!
Rút gọn :
a, \(\frac{24.315+3.561.8+4.124.6}{1+3+5+7+...+97+99-500}\)
b, \(\frac{3^9.3^{20}.2^8}{3^{24}.243.2^6}\)
Trình bày đầy đủ ra .
Nhanh lên nhé ! Cần gấp !
BÀI 1:a/ frac{2}{7}+frac{-3}{8}+frac{11}{7}+frac{1}{3}+frac{1}{7}+frac{5}{-8}b/ frac{-3}{8}+frac{12}{25}+frac{5}{-8}+frac{2}{-5}+frac{13}{25}c/ frac{7}{8}+frac{1}{8}.frac{3}{8}+frac{1}{8}.frac{5}{8}d/ frac{-5}{6}.frac{4}{19}+frac{-7}{12}.frac{4}{19}-frac{40}{57}e/ frac{3}{7}.frac{9}{26}-frac{1}{14}.frac{1}{13}-frac{1}{7}f/ left(frac{2}{3}-frac{1}{ }_{_4+frac{5}{11}}right):left(frac{5}{12}+1-frac{7}{11}right)g/ frac{4}{9}:left(-frac{1}{7}right)+6frac{5}{9}:left(-frac{1}{7}right)h/ 1frac{5}{18}-fr...
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BÀI 1:
a/ \(\frac{2}{7}+\frac{-3}{8}+\frac{11}{7}+\frac{1}{3}+\frac{1}{7}+\frac{5}{-8}\)
b/ \(\frac{-3}{8}+\frac{12}{25}+\frac{5}{-8}+\frac{2}{-5}+\frac{13}{25}\)
c/ \(\frac{7}{8}+\frac{1}{8}.\frac{3}{8}+\frac{1}{8}.\frac{5}{8}\)
d/ \(\frac{-5}{6}.\frac{4}{19}+\frac{-7}{12}.\frac{4}{19}-\frac{40}{57}\)
e/ \(\frac{3}{7}.\frac{9}{26}-\frac{1}{14}.\frac{1}{13}-\frac{1}{7}\)
f/ \(\left(\frac{2}{3}-\frac{1}{ }_{_4+\frac{5}{11}}\right):\left(\frac{5}{12}+1-\frac{7}{11}\right)\)
g/ \(\frac{4}{9}:\left(-\frac{1}{7}\right)+6\frac{5}{9}:\left(-\frac{1}{7}\right)\)
h/ \(1\frac{5}{18}-\frac{5}{18}:\left(\frac{1}{15}+1\frac{1}{12}\right)\)
i/ \(\frac{-1}{7}.\left(9\frac{1}{2}-8,75\right):\frac{2}{7}+62,5\%:1\frac{2}{3}\)
Thực hiện phép tínha,(frac{-5}{28}+1,75+frac{8}{35}).(-3frac{9}{20}) b,(6-2frac{4}{5}).3frac{1}{8}-1frac{3}{5}:frac{1}{4} c,(frac{7-5}{24}+0,75+frac{7}{12}):(-2frac{1}{8}) d,8frac{2}{7}-(3frac{4}{7}+4frac{2}{7}) e,left(-3,2right).frac{-15}{64}+(0,8-2frac{4}{15}):3frac{2}{3} f,1frac{13}{15}.left(0,5right)^2.3+(frac{8}{15}-1frac{19}{60}):1frac{23}{24}g,1,4.frac{15}{49}-(frac{4}{5}+frac{2}{3}):2frac{1}{5...
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Thực hiện phép tính
\(a,(\frac{-5}{28}+1,75+\frac{8}{35}).(-3\frac{9}{20})\) \(b,(6-2\frac{4}{5}).3\frac{1}{8}-1\frac{3}{5}:\frac{1}{4}\)
\(c,(\frac{7-5}{24}+0,75+\frac{7}{12}):(-2\frac{1}{8})\) \(d,8\frac{2}{7}-(3\frac{4}{7}+4\frac{2}{7})\)
\(e,\left(-3,2\right).\frac{-15}{64}+(0,8-2\frac{4}{15}):3\frac{2}{3}\) \(f,1\frac{13}{15}.\left(0,5\right)^2.3+(\frac{8}{15}-1\frac{19}{60}):1\frac{23}{24}\)
\(g,1,4.\frac{15}{49}-(\frac{4}{5}+\frac{2}{3}):2\frac{1}{5}\)
Tính giá trị của các biểu thức :a , A frac{2^{10}.13+2^{10}.65}{2^8.104}b , B frac{4^9.36+64^4}{16^4.100}c , C frac{72^3.54^2}{108^4}d , D frac{4^6.3^4.9^5}{6^{12}}e , E frac{2^{13}+2^5}{2^{10}+2^2}f , F frac{21^2.14.125}{35^5.6}g , G frac{45^3.20^4.18^2}{180^5}h , H frac{11.3^{22}.3^7-9^{15}}{left(2.3^{14}right)^2}
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Tính giá trị của các biểu thức :
a , A = \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
b , B = \(\frac{4^9.36+64^4}{16^4.100}\)
c , C = \(\frac{72^3.54^2}{108^4}\)
d , D = \(\frac{4^6.3^4.9^5}{6^{12}}\)
e , E = \(\frac{2^{13}+2^5}{2^{10}+2^2}\)
f , F = \(\frac{21^2.14.125}{35^5.6}\)
g , G = \(\frac{45^3.20^4.18^2}{180^5}\)
h , H = \(\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)
B1: Thực hiện phép tính :a, 11frac{3}{4}-(6frac{5}{6}-4frac{1}{2})+1frac{2}{3}b, 2frac{17}{20}-1frac{11}{5}+6frac{9}{20}:3c, 4frac{3}{7}:left(frac{7}{5}.4frac{3}{7}right)d, left(3frac{2}{9}.frac{15}{23}.1frac{7}{29}right):frac{5}{23}B2: Thực hiện phép tính:a,11frac{3}{4}-(6frac{5}{6}4frac{1}{2}+1frac{2}{3})
b,left(5frac{7}{8}-2frac{1}{4}-0,5right):frac{23}{26}c,left(17frac{13}{15}-3frac{3}{7}right)-left(2frac{12}{15}-4right)
d,2frac{2}{3}.frac{-4}{5}.0,375-left(-10right).frac{-15}{24}
Đọc tiếp
B1: Thực hiện phép tính :
a, \(11\frac{3}{4}-(6\frac{5}{6}-4\frac{1}{2})+1\frac{2}{3}\)
b, \(2\frac{17}{20}-1\frac{11}{5}+6\frac{9}{20}:3\)
c, \(4\frac{3}{7}:\left(\frac{7}{5}.4\frac{3}{7}\right)\)
d, \(\left(3\frac{2}{9}.\frac{15}{23}.1\frac{7}{29}\right):\frac{5}{23}\)
B2: Thực hiện phép tính:
\(a,11\frac{3}{4}-(6\frac{5}{6}4\frac{1}{2}+1\frac{2}{3})\\ b,\left(5\frac{7}{8}-2\frac{1}{4}-0,5\right):\frac{23}{26}\)
\(c,\left(17\frac{13}{15}-3\frac{3}{7}\right)-\left(2\frac{12}{15}-4\right)\\ d,2\frac{2}{3}.\frac{-4}{5}.0,375-\left(-10\right).\frac{-15}{24}\)