Tính nhanh : \(\frac{4,8\cdot0,5+16\cdot0,6+0,02:0,01}{4200\cdot0,02}+\frac{1818}{8181}\)
\(\frac{2014\cdot2015-1}{2015\cdot2013+2014}\); \(\frac{1978\cdot1979+1980\cdot21+1958}{1980\cdot1979-1978\cdot1979}\)
\(\frac{2016\cdot12+2003+2000\cdot2015+2015}{2015+2015\cdot502+504\cdot2015}\)
Các thánh lớp 5 = > 6 thử trổ tài ik nhé = ))) Đừng vào mạng chép
Tính nhanh :
a ) \(\frac{2016\cdot12+2003+2000\cdot2015+2015}{2015+2015\cdot502+504\cdot2015}\)
b )\(\frac{1978\cdot1979+1980\cdot21+1958}{1980\cdot1979-1978\cdot1979}\)
\(\frac{2014\cdot2015-1}{2015\cdot2013+2014}\)
Help, giúp mink, làm ơn
\(\frac{1998\cdot1996+1997+1995}{1997\cdot1996-1995\cdot1996}\) \(\frac{1994\cdot1993-1992\cdot1993}{1992\cdot1993+1994\cdot7+1986}\)
\(\frac{399\cdot45+55\cdot399}{1995\cdot1996-1991\cdot1995}\) \(\frac{2006\cdot\left(0.4-3:7.5\right)}{2005\cdot2006}\)
\(\frac{1978\cdot1979+1980\cdot21+1958}{1980\cdot1979-1978\cdot1979}\) \(\frac{2.43\cdot12300-24.3\cdot1230}{45\cdot20.1+55\cdot28.9+4.5+3.3-55\cdot5.37}\)
\(\frac{1996\cdot1997+1998\cdot3+1994}{1997\cdot1999-1997\cdot1997}\) \(\frac{2003\cdot14+1988+2001\cdot2002}{2002+2002\cdot503+504\cdot2002}\)
Tính nhanh :
a) \(\frac{2015\cdot2017-1}{2014+2015\cdot2016}\)
b) \(\frac{1}{1\cdot5}+\frac{1}{5\cdot9}+...+\frac{1}{2011\cdot2015}\)
c)\(\frac{12}{35}+\frac{1212}{3535}+\frac{121212}{353535}+\frac{12121212}{35353535}\)
\(\left(2013\cdot2014+2014\cdot2015+2015\cdot2016\right)\cdot\left(1+\frac{1}{3}-1\frac{1}{3}\right)\)
tính nhanh
a) (1978*1979+1980*21+1958)/(1980*1979-1978*1979)
b) 2016*20162015-2015*20162016
\(\frac{45\cdot16-17}{45\cdot15+28}\) các bạn đề là tính nhanh nhé
Ví dụ: \(\frac{2016\cdot2015-5}{2014\cdot2016+2011}=\frac{2016\cdot\left(2014+1\right)-5}{2014\cdot2016+2011}=\frac{2016\cdot2014+2016\cdot1-5}{2014\cdot2016-2011}=\frac{2016\cdot2014+2011}{2014\cdot2016+2011}=1\)
\(\frac{2014\cdot2015-1}{2013\cdot2015+2014}\)
\(\frac{2014\cdot2015-1}{3013\cdot2015+2014}\)
