Question

7 Calculează: a) 256 - [70+ (70+28)] = b) (87-57) ×[(376:4-2):2]
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Answer 1

Răspuns:

a) 256 - [ 70 + ( 70 + 28 )]

= 256 - ( 70 + 98 )

= 256 - 168

= 88

b) ( 87 - 57 ) × [( 376 : 4 - 2) : 2]

= 30 × [( 94 - 2 ) : 2 ]

= 30 × ( 92 : 2 )

= 30 × 46

= 1380

Answer 2

Răspuns:

a)256-[70+(70+28)]=

=256-(70+98)=

=256-168=

=88

b)(87-57)×[(376:4-2):2]=

=30×[(94-2):2]=

=30×(92:2)=

=30×46=

=1380