\(\frac{7256\cdot4375-725}{3650+4375\cdot7255}\)
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= (7255+1).4375-725/3650+4375.7255
=7255.4375+1.4375-725/4375.7255+3650
=7255.4375+4375-725/4375.7255+3650
=7255.4375+3650/4375.7255+3650
=1
a) Ta có: \(347\cdot2^2-2^2\left(216+184\right):8\)
\(=347\cdot4-4\cdot400:8\)
\(=1388-200=1188\)
7256*4375-725/3650+4375*7255
= 7256 * 4375 + 4375 * 7255 - 29/146
= 4375* ( 7256+7256) -29/146
= 4375* 14512 -29/146
= 63490000- 29/146
7256 x 4375 - 725
= 31745000 - 725
= 31744275
3650 + 4375 x 7255
= 3650 + 31740625
= 31744275
7256 * 4375 - 725 = 31745000 - 725 = 31744275
3650 + 4375 * 7255 = 3650 + 31740625 = 31744275
OK
\(\dfrac{7256.4375-725}{3650+4375.7255}\)
\(=\dfrac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+1.4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+3650}{3650+4375.7255}=1\)
\(\dfrac{7256.4375-725}{3650+4375.7255}=\dfrac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+4375-725}{3650+4372.7255}=\dfrac{7255.4375+3650}{3650+4375.7255}=1\)