Question

Calculeaza:a)(87-57)×[(376:4-2):2]=;b)2×500-[80+(247×4-801:9)-300]=;c)[(282:3-2):2]×500-25×4×5)=.​

Answer 1

a) (87 - 57) x [(376 : 4 - 2) : 2] =

= 30 x [(94 - 2) : 2] =

= 30 x (92 : 2) =

= 30 x 46 =

= 1380

b) 2 x 500 - [80 + (247 x 4 - 801 : 9) - 300] =

= 1000 - [80 + (1096 - 89) - 300] =

= 1000 - (80 + 1007 - 300) =

= 1000 - (1087 - 300) =

= 1000 - 787 =

= 213

c) [(282 : 3 - 2) : 2] x 500 - 25 x 4 x 5 =

= [(94 -2) : 2] x 500 - 100 x 5 =

= (92 : 2) x 500 - 500 =

= 46 x 500 - 500 =

= 23000 - 500 =

= 22500