Question

Answer 1

a)

= 12 : { 400 : [500 - 300]}

= 12 : { 400 : 200}

= 12 : 2

= 6

b)

= 9.[(25-3):11]-16+2.1000

= 9.[22:11]-16+2.1000

= 9.2-16+2.1000

= 18-16+2.1000

= 18-16+2000

= 2+2000

= 2002

Answer 2

a) 12 : {400 : [ 500 -(125 + 25 x 7)]}

= 12 : { 400 : [500 - 300]}

= 12 : { 400 : 200}

= 12 : 2

= 6

Answer 3

b) 3² .[( 5² - 3) : 11] - 2⁴ + 2 . 10³

= 9 .[( 25 - 3) : 11] - 16 + 2 . 10000

=9 . [ 23 : 11] - 16 + 2 .10000

= 9 . 2 - 16 + 2 . 10000

= 18 - 16 + 20000

= 2 + 20000

= 20002 (dư1)

Answer 4