c: \(124\cdot237+152\)
\(=\left(122+2\right)\left(235+2\right)+152\)
\(=235\cdot122+2\cdot122+2\cdot235+4+152\)
\(=235\cdot122+870\)
Ta có: \(\frac{124\cdot237+152}{870+235\cdot122}\)
\(=\frac{122\cdot235+870}{122\cdot235+870}=1\)
d: \(423134\cdot846267-423133\)
\(=846267\left(423133+1\right)-423133\)
\(=846267\cdot423133+846267-423133\)
\(=846267\cdot423133+423134\)
Ta có: \(\frac{423134\cdot846267-423133}{846267\cdot423133+423134}\)
\(=\frac{846267\cdot423133+423134}{846267\cdot423133+423134}\)
=1
Đúng 0
Bình luận (0)
