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\((1999x1998+1998x1997)x(1+\frac{1}{2}\)\(:1\frac{1}{2}\)\(-1\frac{1}{3}\)\()\)
= \((1999x1998+1998x1997)x\)\((1+\frac{1}{2}\)\(:\frac{3}{2}\)\(-\frac{4}{3}\)\()\)
= \((1999x1998+1998x1997)x\)\((1+\frac{1}{3}\)\(-\frac{4}{3}\)\()\)
= \((1999x1998+1998x1997)x\)\((\frac{4}{3}-\frac{4}{3}\)\()\)
=\((1999x1998+1998x1997)x\)0
= 0
Chúc bạn học tốt!
Ta có:
\((1999x1998+1998x1997)x(1+\frac{1}{2}:1\frac{1}{2}-1\frac{1}{3})\)
\(=(1999x1998+1998x1997)x\left(1+\frac{1}{2}:\frac{3}{2}-\frac{4}{3}\right)\)
\(=\left(1999x1998+1998x1997\right)x\left(1+\frac{1}{3}-\frac{4}{3}\right)\)
\(=\left(1999x1998+1998x1997\right)x\left(\frac{4}{3}-\frac{4}{3}\right)\)
\(=\left(1999x1998+1998x1997\right)x0=0\)
a) = 36 , 34
b)= 56
\(=\left(\frac{5}{12}+\frac{7}{12}\right)+\frac{3}{2014}=\frac{12}{12}+\frac{3}{2014}\)= \(1+\frac{3}{2014}=\frac{3}{2014}\)
\hk tốt
\(\frac{2}{3}=\frac{36}{54}\)
\(\frac{4}{7}=\frac{28}{49}\)
\(\frac{48}{100}=\frac{12}{25}\)
\(\frac{45}{81}=\frac{5}{9}\)
\(\frac{1}{2}+\frac{15}{10}+\frac{8}{4}+\frac{36}{24}\)
\(=\frac{5}{10}+\frac{15}{10}+\frac{48}{24}+\frac{36}{24}\)
\(=2+\frac{7}{2}\)
\(=\frac{4}{2}+\frac{7}{2}\)
\(=\frac{11}{2}\)
chúc bạn học tốt !!!
\(\frac{1}{2}+\frac{15}{10}+\frac{8}{4}+\frac{36}{24}\)
\(=0,5+1,5+2+\frac{3}{2}\)
\(=0,5+1,5+2+1,5\)
\(=2+2+1,5\)
\(=4+1,5\)
\(=5,5\)
Chúc bạn học tốt !!!
A = \(\frac{1995.1996-1997}{1995.1994+1993}\)
= \(\frac{1995.\left(1994+2\right)-1997}{1995.1994+1993}\)
= \(\frac{1995.1994+1995.2-1997}{1995.1994+1993}\)
= \(\frac{1995.1994+3990-1997}{1995.1994+1993}\)
= \(\frac{1995.1994+1993}{1995.1994+1993}\)
= \(1\)
b) B = \(\frac{12345.67890-54321}{12344.67890+13569}\)
= \(\frac{\left(12344+1\right).67890-54321}{12344.67890+13569}\)
= \(\frac{12344.67890+67890-54321}{12344.67890+13569}\)
= \(\frac{12344.67890+13569}{12344.67890+13569}\)
= \(1\)
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