Toán Lớp 6: (198*1990+3978)”(1992*1991+3948)
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Toán Lớp 6: (198*1990+3978)”(1992*1991+3948)
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GIẢI THÍCH:
1989 . 1990 + 3978 / 1992 . 1991 – 3984 = 1989 . 1990 + 1989 . 2 / 1992 . 1991 – 1992 . 2
= 1989.( 1990 + 2 ) / 1992.( 1991 – 2 )
= 1989.1992 / 1992. 1898
=1