a) 19 + 19 . 99 - 25 . 4
= 19 . 100 - 25 . 4
= 1900 - 100
= 1800
b) 2 . [(7 - 33 : 32) : 22 + 99] - 100
= 2 . [(7 - 3) : 4 + 99] - 100
= 2 . [4 : 4 + 99] - 100
= 2 . [1 + 99] - 100
= 2 . 100 - 100
= 200 - 100
= 100
c) | -5 + 9 | + ( -29 + 5 )
= 4 + (-24)
= -20
a)19+19.99-25.4
=19.999+1)-100
=19.100-100
=100.(19-1)
=100.18
=1800
b)2.[(7-3^3:3^2):2^2+99]-100
=2.[(7-3):4+99]-100
=2.[4:4+99]-100
=2.[1+99]-100
=2.100-100
=200-100
=100
c)|-5+9|+(-29+5)
=|4|+(-24)
=4+(-24)
=-20
a,
=19+1881-100
=1900-100
=1800.
b,
=2.[(7-27:9):4+99]-100
=2.[(7-3):4+99]-100
=2.[4:4+99]-100
=2.[1+99]-100
=2.100-100
=200-100
=100
c,
=|4|+(-24)
=4+(-24)
=-20.