minh cung sap chiu thua roi nhun ming cung vua h ra mot ket qua day

dap an la -10.38947368

neu dung thi k nhe cam on

Bài giải 

Ta có :

\(\frac{16,2\times3,7+5,7\times16,2-7,8\times4,8+4,6\times7,8}{11,2+12,3+13,4+12,6+11,5+10,4}\)

\(=\frac{16,2\times\left(3,7+5,7\right)-7,8\times\left(4,8+4,6\right)}{\left(13,4-12,6\right)+\left(12,3-11,5\right)+\left(11,2-10,4\right)}\)

\(=\frac{16,2\times9,4-7,8\times9,4}{0,8+0,8+0,8}\)

\(=32,9\)

Vậy  ............

cảm ơn cậu

\(\frac{17,8.3,7-7,8.4,8+5,7.17,8-4,6.7,8}{11,2+12,3+13,4-12,6-11,5-10,4}\)

\(=\frac{17,8\left(3,7+5,7\right)-7,8\left(4,8+4,6\right)}{\left(13,4-12,6\right)+\left(12,3-11,5\right)+\left(11,2-10,4\right)}\)

\(=\frac{17,8.9,4-7,8.9,4}{0,8+0,8+0,8}\)

\(=119,1\)

4659/25=186.36

\(a)16,2.3,7+16,2.5,7-7,8.4,8-4,6.7,8\)

\(=16,2\left(3,7+5,7\right)-7,8\left(4,8-4,6\right)\)

\(=16,2.9,4-7,8.0,2\)

\(=152,28-1,56=150,72\)

\(b)11,2+12,3+13,4-12,6-11,5-10,4\)

\(=23,5+13,4-10,4-12,6-11,5\)

\(=23,5-11,5-23+13,4\)

\(=12-23+13,4=-11+13,4=2,4\)

\(=\dfrac{16.2\cdot9.4-7.8\cdot9.4}{2,4}=\dfrac{8.4\cdot9,4}{2,4}=32.9\)

6t5rỵtgydjhjASkdjghrHGj

eeeereeeeettttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt