Question

1) Tính :

a) -20 - ( 3 - 6 )

b) 5 ( -3 )⁴ + 2 . ( -7 ) - ( -18 )

c) -25 - [ - 40 - ( -29 ) ]

Giúp với

Answer 1

a) - 20 - ( 3 - 6 )

= - 20 - ( - 3 )

= - 20 + 3

= - 17

b) 5 . ( - 3 )⁴ + 2 . (- 7) - ( - 18 )

= 5 . 81 + 2 . ( - 7 ) + 18

= 405 + ( - 14 ) + 18

= 381 + 18

= 399

c) - 25 - [ - 40 - ( - 29 ) ]

= - 25 - [ - 40 + 29 ]

= - 25 - ( - 11 )

= - 25 + 11

= - 14

Answer 2

a) - 20 - ( 3 - 6 ) = - 20 + 3 = - 17

b) 5 ( - 3 )⁴ + 2 . ( - 7 ) - ( - 18 ) = 5 . 81 + 2 . ( - 7 ) + 18

= 405 - 14 + 18

= 409

c) - 25 - [ - 40 - ( - 29 ) ] = - 25 + 11 = - 14