=5400

\(\text{6.75.1.25-0.675.120-6.75.13}\)

\(=5400\)

Bạn nhé !!! k với nha !!!

=5400

6.75*3=20.25

(7.14*3)*3=64.26

(9.26*2)*9=166.68

=(1.25-1.25)-(6.75-6.75)+11x65+11x3x5

=0-0+11x(65-15)

=11x50

=550

   1.25 - 6.75 + 6.75 + 11 x 65 -1.25+33 x 5

=(1.25-1.25)+(6.75-6.75)+11.65+11.3.5

=0+0+11.65+11.(3.5)

=11.65+11.15

=11.(65+15)

=11.80

=880

Bạn "Frisk" sai dấu nha,dòng 3

= 2.75*(21-7) + 4*25

= 2.75*14 + 4*25

= 2.75*(10+4) + 4*25

Ta có 2,75*21+4*25-7*2,7

=2,75*(21-7)+4*25

=2,75*14+100

=38,5+100

=138,5

2.75*(21-7)+4*25

2.75*14+4*25

38.5 + 100

138.5

\(a.75^2-50.75+25^2\\ =75^2-2.25.75+25^2\\ =\left(75-25\right)^2=50^2=2500\)

\(b.103.97\\ =\left(100+3\right)\left(100-3\right)\\ =100^2-3^2\\ =9991\)

\(a,75^2-50.75+25^2\\ =75^2-2.75.25+25^2\\ =\left(75+25\right)^2=100^2=10000\\ b,103.97\\ =\left(100+3\right).\left(100-3\right)\\ =100^2-3^2=10000-9=9991\)

a) \(75^2-2\cdot25\cdot75+25^2\)

= \(\left(75+25\right)^2\)

= \(100^2=10000\)
b) \(103\cdot97\)

= \(\left(100+3\right)\left(100-3\right)\)

= \(100^2-3^2\)

= \(10000-9=9991\)

\(75^2+25^2-50.75\)

\(=75^2-2.25.75+25^2\)

\(=\left(75-25\right)^2\)

\(=50^2\)

\(=2500\)

=4,25(57,43+42,57)-325

=4,25.100-325

=425-325=100