a) \(18,5:4,6+14,8:4,6+12,7:4,6\)

\(=\left(18,5+14,8+12,7\right):4,6\)

\(=46:4,6=10\)

b) \(0,75.1,3+0,25.1,3\)

\(=\left(0,75+0,25\right).1,3\)

\(=1.1,3=\dfrac{13}{10}\)

a) \(18,5:4,6+14,8:4,6+12,7:4,6\)

\(=\dfrac{18,5}{4,6}+\dfrac{14,8}{4,6}+\dfrac{12,7}{4,6}\)

\(=\dfrac{1}{4,6}.\left(18,5+14,8+12,7\right)\)

\(=\dfrac{1}{4,6}.46=10\)

b) \(...=1,3.\left(0,75+0,25\right)=1,3.1=1,3\)

c) \(...=0:31,792=0\)

c) \(\left(7,91+5,09-6,05-6,95\right):31,792\)

\(=0:31,792=0\)

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

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4659/25=186.36

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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

=1 day 

\(\frac{16,2.3,7+5,7.16,2-7,8.4,8-4,6.7,8}{11,2+12,3+13,4-12,6-11,5-10,4}\)

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

\(=\)\(\frac{16,2.9-7,8.0,2}{36,9-34,5}\)

\(=\)\(\frac{145,8-1,56}{2,4}\)

\(=\)\(\frac{144,24}{2,4}\)

\(=\)\(60,1\)

\(\text{Học tốt!!!}\)

cảm ơn

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

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

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

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

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

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

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

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