b)B=(136/15 - 28/5 +31/5).21/24
B=(136/15-(28/5 - 31/5).21/24
B=(136/15 + 3/5).21/24
B=29/3.21/24
B=203/24
\(A=1.2.3...100-1.2.3...99-1.2.3...98.99^2\)
\(=1.2.3...99\left(100-1-99\right)\)
\(=1.2.3...99.0=0\)
b)B=(136/15 - 28/5 +31/5).21/24
B=(136/15-(28/5 - 31/5).21/24
B=(136/15 + 3/5).21/24
B=29/3.21/24
B=203/24
\(A=1.2.3...100-1.2.3...99-1.2.3...98.99^2\)
\(=1.2.3...99\left(100-1-99\right)\)
\(=1.2.3...99.0=0\)
Tính nhanh :
\(\left(\frac{136}{15}-\frac{28}{5}+\frac{62}{10}\right).\frac{21}{24}\)
a,\(\left(\frac{136}{15}-\frac{28}{5}+\frac{62}{10}\right)\frac{21}{24}\)
Thực hiện phép tính để tính giá trị các biểu thức sau:
\(a,A=\left(\frac{136}{15}-\frac{28}{5}+\frac{62}{10}\right).\frac{21}{24}\)
\(b,B=70.\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(c,C=\frac{5}{2.1}+\frac{4}{1.11}+\frac{3}{11.2}+\frac{1}{2.15}+\frac{13}{15.4}\)
Tính :
\(A=\frac{28}{15}.\left(\frac{1}{2}\right)^2.3+\left(\frac{8}{15}-\frac{79}{60}\right).\frac{24}{47}\)
\(B=\frac{75}{100}.\frac{28}{15}-\left(\frac{104}{195}+\frac{25}{100}\right).\frac{24}{47}-\frac{51}{13}.\frac{1}{3}\)
Ai làm xong mk k nha!!!
Tính
a)\(A=\frac{8}{9}.\frac{15}{16}.\frac{24}{25}....\frac{2499}{2500}\)
b)\(B=\left(1-\frac{1}{3}\right)\left(1-\frac{1}{6}\right)\left(1-\frac{1}{10}\right)\left(1-\frac{1}{15}\right)...\left(1-\frac{1}{780}\right)\)
GIÚP mk vs ạ , ai nhanh đúng mk sẽ tick ạ
(\(\frac{136}{15}-\frac{28}{5}+\frac{62}{10}\)) .\(\frac{21}{24}\)
a) \(\left(\frac{9}{10}-\frac{15}{16}\right).\left(\frac{5}{12}-\frac{11}{15}-\frac{7}{20}\right)\)
B) \(\frac{-3}{5}+\frac{28}{5}.\left(\frac{43}{56}+\frac{5}{24}-\frac{21}{63}\right)\)
thực hiện phép tính
Tính giá trị của biểu thức
A=1.2.3........100-1.2.3.....99-1.2.3.....99^2
B=\(\frac{\left\{3.4.2^{16}\right\}}{11.2^{13}.4^{11}-4^9.2^{18}}\)
C=1.2+2.3+3.4+...+98.99
D=\(\frac{2}{1.3}\)+\(\frac{2}{3.5}\)+\(\frac{2}{5.7}\)+....+\(\frac{2}{99.101}\)
Tính giá trị biểu thức
A=\(\frac{1}{1.2.3}+\frac{1}{2.3.4}+\frac{1}{3.4.5}+....+\frac{1}{48.49.50}\)
B=\(-\frac{3}{5}.\frac{3}{8}+2\frac{3}{5}+\frac{-3}{5}.\frac{5}{8}\)
C=\(1\frac{3}{5}.0,75-\left(\frac{11}{20}-25\%\right):\frac{3}{7}\)
Ai làm nhanh và đúng câu B và C mk sẽ chọn nhé.