A) 0,8 :(\(\dfrac{4}{5}\) x 1,25+(108%-\(\dfrac{2}{25}\)):\(\dfrac{1}{3}\))
=0,8:(1+1:\(\dfrac{1}{3}\)+
=0,8:4
=0,2
B)9,6:(2,36+3,64)-0,6
=9,6:6-0,6
=1,6-0,6
=1
C)3\(\dfrac{1}{2}\) x 2\(\dfrac{3}{4}\) -3\(\dfrac{1}{2}\) x 1\(\dfrac{1}{4}\)
=\(\dfrac{7}{2}\)x (\(\dfrac{11}{4}\)-\(\dfrac{5}{4}\))
=\(\dfrac{7}{2}\)x\(\dfrac{6}{4}\)
=\(\dfrac{42}{8}\)
Bài 2
A)2448:(119-(X-6))=24
119-(x-6)=102
x-6=17
x=23
Đúng 3
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