Answer:

Bài 3:

\(334-\left(-75\right)+[\left(-175\right)-34]\)

\(=334+75-175-34\)

\(=\left(334-34\right)+\left(75-175\right)\)

\(=300+\left(-100\right)\)

\(=200\)

\(68-\left(-45\right)-[368-\left(-145\right)]\)

\(=68+45-[368+145]\)

\(=\left(68-368\right)+\left(45-145\right)\)

\(=\left(-300\right)+\left(-100\right)\)

\(=-400\)

Bài 4:

\(-17-\left(x-5\right)=-52\)

\(\Rightarrow x-5=-17-\left(-52\right)\)

\(\Rightarrow x-5=35\)

\(\Rightarrow x=40\)

\(3\left(7-x\right)+\left(-12\right)=-75\)

\(\Rightarrow3\left(7-x\right)=-75-\left(-12\right)\)

\(\Rightarrow3\left(7-x\right)=-63\)

\(\Rightarrow7-x=-21\)

\(\Rightarrow x=28\)

a: Ta có: \(A=\dfrac{35^3+13^3}{48}-35\cdot13\)

\(=35^2-35\cdot13+13^2-35\cdot13\)

\(=\left(35-13\right)^2\)

\(=22^2=484\)

b: Ta có: \(B=\dfrac{68^3-52^3}{16}+68\cdot52\)

\(=68^2+68\cdot52+52^2+68\cdot52\)

\(=\left(68+52\right)^2=14400\)

a,=15050
b, = 10000

a) 50 . 301

= 50 .(300 + 1)

= 50 . 300 + 50

= 50 . 3 . 100 + 50

= 150 . 100 + 50

= 15000 + 50

= 15050

b) 32 . 48 + 52 . 32 + 68 . 100

= 32 . (48 + 52) + 68 . 100

= 32 . 100 + 68 . 100

= 100 . (32 + 68)

= 100 . 100

= 10 000

104.68-36.52

=104.68-18.2.52

=104.68-18.104

=(68-18)104

=50.2.52

=100.52=5200

104.68-36.52

=52.2.68-36.52

=52.136-36.52

=52.(136-36)

=52.100

=5200

Cho mình hỏi bài toán 92 - x = 45 -16

= 52 nha em