Tính nhanh:
\(\dfrac{1988\times1996+1997+1985}{1997\times1996-1995\times1996}\)
Tim A
\(A=\frac{1998\times1996+1997\times11+1985}{1997\times1996-1995\times1996}\)
Tính nhanh \(\frac{1988\times1996+1997+1995}{1997\times1996-1995\times1996}\)
Tính nhanh:
\(\frac{1998\times1996+1997+1995}{1997\times1996-1995\times1996}\)
\(\frac{1998\cdot1996+1997+1995}{1997\cdot1996-1995\cdot1996}\) \(\frac{1994\cdot1993-1992\cdot1993}{1992\cdot1993+1994\cdot7+1986}\)
\(\frac{399\cdot45+55\cdot399}{1995\cdot1996-1991\cdot1995}\) \(\frac{2006\cdot\left(0.4-3:7.5\right)}{2005\cdot2006}\)
\(\frac{1978\cdot1979+1980\cdot21+1958}{1980\cdot1979-1978\cdot1979}\) \(\frac{2.43\cdot12300-24.3\cdot1230}{45\cdot20.1+55\cdot28.9+4.5+3.3-55\cdot5.37}\)
\(\frac{1996\cdot1997+1998\cdot3+1994}{1997\cdot1999-1997\cdot1997}\) \(\frac{2003\cdot14+1988+2001\cdot2002}{2002+2002\cdot503+504\cdot2002}\)
Tính nhanh: a) 1988*1996+1997+1985/1997*1996-1995*1996 b) 989898/454545 - 31313131/15151515
Bài 1. so sánh A vs B biết A=2003*2004-1/2003*2004 , B=2004*2005-1/2004*2005
Bài 2. so sánh A vs B biết A=1978*19778+1980+21+1958/1980*1979-1978*1979, B=1000
Bài 3.so sánh A vs B biết A =1997*1996-1/1995*1997+1996, B=254+399-145/245+399*253
Bài 4.so sánh A vs B biết A=1997*1996-995/1995 *1997+1002, B= 5932+6001*5931/5932*6001-69
Tính giá trị biểu thức sau bằng cách hợp lí nhất
\(\frac{1998\cdot1996+1997\cdot11+1985}{1997\cdot1996-1995\cdot1996}\)
1988 . 1996 + 1997 + 1985
1997 . 1996 - 1995 . 1996
CHÚ THÍCH : dấu chấm là dấu nhân nhé !!!
THANK YOU !!!