a) {145 -[130 -(246 - 236)]: 2}. 5
= {145 -[130 - 10]: 2}. 5
= {145 - 120 : 2}. 5
= {145 - 60}. 5
= 85 .5
=425
b) 100 :{250 :[450 -(4 . 5³ - 2² . 25)]}
= 100 :{250 :[450 -(4 . 125 - 4 . 25)]}
= 100 :{250 :[450 -(4 .(125 - 25)]}
= 100 :{250 :[450 -(4 . 100)]}
= 100 :{250 :[450 - 400]}
= 100 :{250 : 50}
= 100 : 5
= 20
c) 325 - 5 .[4³ -(27 - 5²): 1^18]
= 325 - 5 .[64 -(27 - 25): 1]
= 325 - 5 .[64 - 2 : 1]
= 325 - 5 . 62
= 325 - 310
= 15
d) 17^0 -[5^13 : 5^11 +(135 - 130)³]
= 1 -[5^13-11 +(135 - 130)³]
= 1 -[5² + 5³]
= 1 -[25 + 125]
= 1 - 150
= -149
e) 2² . 19 - 2³ . 14 + 1^2018
= 4 . 19 - 8 . 14 + 1
= 76 - 112 + 1
= -35
f) 10² -[60 :(5^6 : 5^4 - 3 . 5)]
= 100 -[60 :(5^6-4 - 3 . 5)
= 100 -[60 :(5² - 3 . 5)
= 100-[60 :(25 - 15)
= 100 -[60 : 10]
= 100 - 6
= 94
h) 798 + 100 :[16 - 2(5² - 22)]
= 798 + 100 :[16 - 2(25 - 22)]
= 798 + 100 :[16 - 2 . 3]
= 798 + 100 : 10
= 808
