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\(\frac{423134.846267-423133}{846267.423133+423134}\)

Xét tử số : 423134.846267-423133

= (423133+1).846267-423133

= 423133.846267+846267-423133

=423133.846267+ 423134

Ta có : \(\frac{423133.846267+423134}{846267.423133+423134}\)=1

= 1 100% bởi vì đó là tính nhanh

ks mình

ket qua la 1 nhe

\(\frac{423134.846267-423133}{846267.423133+423134}=\frac{\left(423134+1\right).846267-423133}{846267.423133+423134}\)

\(\frac{423133.846267+846267-423133}{846267.423133-423134}=\frac{423133.846267-423134}{864267.423133-423134}=1\)

\(\dfrac{423134.846267-423133}{846267.423133+423134}\)

\(=\dfrac{423134.846267-423133}{846267.\left(423134-1\right)+423134}\)

\(=\dfrac{423134.846267-423133}{846267.423134-846267+423134}\)

\(=\dfrac{423134.846267-423133}{846267.423134-423133}\)

\(=1\)

Chúc bạn học tốt!!!!

\(=\frac{\left(423133+1\right).846267-423133}{846267.423133+423134}=\frac{846267.423133+846267-423133}{846267.423133+423134}=\)

\(=\frac{846267.423133+423134}{846267.423133+423134}=1\)

\(\dfrac{423134.846267-423133}{846267.423133+423134}.\)

\(=\dfrac{\left(423133+1\right).846267-423133}{846267.423133+423134}.\)

\(=\dfrac{423133.846267+\left(846267-423133\right)}{846267.423133+423134}.\)

\(=\dfrac{423133.846267+423134}{846267.423133+423134}=1.\)

Vậy..........

=125

=94,31

125

94,31

\(a,12\cdot19+12\cdot34+12\cdot20+88\cdot27\)

\(=12\cdot\left(19+34+20\right)+88\cdot27\)

\(=12\cdot73+88\cdot27\)

\(=12\cdot73+88\cdot\left(15+12\right)\)

 kết quả là = 1 

kết quả = 0

\(\frac{423134\cdot846267-423133}{846267\cdot423133+423134}=0\)

Tích nha bạn

1990.1990-1992.1998

=1990.1990-(1990+2).1998

=1990.1990-1990.1998+2.1998

=1990.(1990-1998)+2.1998

=1990.(-8)+2.(1990+8)

=1990.(-8)+2.1990+2.8

=1990.((-8)+2)+16

=1990.(-6)+16

=(-11940)+16

=-11924