hgfdfg=hgfdfg=hgfdfgx1=hgfdfg:1

chỉ có thế thôi

=hgfdfg

hdfdfg

a) 14 + 27 + 36 = (14 + 36) + 27 = 50 + 27 = 77

b) 4.15.25.6 = (4.25).(15.6) = 100.90 = 9000

c) 5.125.2.4 = (5.4).(125.4) = 10.500 = 5000

d) 176 + 483 + 24 + 117 = (176+24) + (483 + 117) = 200 + 600 = 800

e) 12.41 + 12.59 = 12.(41+59) = 12.100 = 1200

f) 17.32 + 43.17 + 17.25 = 17.(32+43+25) = 17.100 = 1700

g) 2 + 4 + 6 + … + 22 = 2.(1 + 2 + 3 + … + 11) = 2.(12.11:2) = 2.66 = 132

=718.5 yen

3,175 tấn +295 kg + 17,25 tạ = 348, 725 yến

cảm ơn

Ta có: \(\left(\frac{8}{1.9}+\frac{8}{9.17}+\frac{8}{17.25}+...+\frac{8}{49.57}\right)+2\left(x-1\right)=\frac{2x+7}{3}+\frac{5x-8}{4}\)

\(\Leftrightarrow1-\frac{1}{9}+\frac{1}{9}-\frac{1}{17}+\frac{1}{17}-\frac{1}{25}+....+\frac{1}{49}-\frac{1}{57}+2x-2=\frac{8x+28+15x-24}{12}\)

\(\Leftrightarrow1-\frac{1}{57}+2x-2=\frac{23x+4}{12}\)

\(\Leftrightarrow2x-\frac{58}{57}=\frac{23x+4}{12}\)

\(\Leftrightarrow24x-\frac{232}{19}=23x+4\)

\(\Leftrightarrow x=\frac{308}{19}\)

   ^{\(75.17-17.25+5^2\)}

 \(=75.17-17.25+25\)

 \(=17.\left(75-25+25\right)\)

  \(=17.\left(50+25\right)\)

  \(=17.75\)

  \(=1275\)

75x17-17x25+5²

=17x(75-25)+5²

=17x50+5²

=850+25

=875