Question

34.{[(216+184):8]-42}

465+58+(-465)+(-78)

1+(-3)+5+(-7)+9+(-11)

1+2+3.......+100

80-[30-(5-1)2]

Answer 1

34.{[(216+184):8]-42}

=34.{[400:8]-42}

=34.{50-42}

=34.8

=272

465+58+(-465)+(-78)

=523+(-465)+(-78)

=58+(-78)

=-20

1+(-3)+5+(-7)+9+(-11)

=[1+(-3)]+[5+(-7)]+[9+(-11)]

=-2.3

=-6

1+2+3.......+100

=101x50

=5050

80-[30-(5-1)2]

=80-[30-4.2]

=80-[30-8]

=80-22

=58

 

 

Answer 2

34.{[(216+184):8]-42}

= 34.[(400:8)-42]

= 34.(50-42)

= 34.8

= 272

465+58+(-465)+(-78)

= (465-465)+(58-78)

= 0+(-20)

= -20

1+(-3)+5+(-7)+9+(-11)

= (1+5+9)-(3+7+11)

= 15-21

= -6

1+2+3+...+100=\(\frac{\left(100+1\right).100}{2}\)=5050

80-[30-(5-1).2]

= 80-(30-4.2)

= 80-(30-8)

= 80-30+8

= 50+8

= 58