4.5²  - 32 : 2⁴
= 4. 25 - 32 : 16
= 100 - 2
= 98
20 - [30 - (5 - 1)² : 2]
= 20 - [30 - 4² : 2]
= 20 - (30 - 16 : 2)
= 20 - (30 - 8)
= 20 - 22
= -2

4, 4.5^5 - 32:2^4
= 4.3125 - 32:16
=12500-2
=12498
6, 80-(4.5^2 - 3.2^3)
= 80 -4.25 + 3.8
=80-100+24
=4
8, 35-{12-[-14+(-2)]}
= 35 - 12 + (-16)
= 35-12-16
= 7

4) 4.5^5-32×2^4
=4×3215-32×16
=12348
5) 20 - [30 - (5 - 1)^2: 2]
= 20 - [30 - 4^2 : 2]
= 20 - (30 - 16 : 2)
= 20 - (30 - 8)
= 20 - 22
= -2
6)80-(4.5^2-3.2^3)
=80-(4.25-3.8)
=80-(100-24)
=80-76
=4

Gửi bn nha!!! 
CHÚC BN HỌC TỐT!!! :)))

4) 4 . 5^5 - 32 : 2^4
= 4 . 3125 - 32 : 16
= 12500 -  2
= 12498
5) 20 - [30 - (5 - 1)^2 : 2]
= 20 - [ 30 - 16 : 2 ]
= 20 - [ 30 - 8 ]
= 20 - 22
= -2
6) 80 - (4 . 5^2 - 3 . 2^3)
= 80 - ( 4 . 25 - 3 . 8 )
= 80 - (100-24)
= 80 - 76
= 4
7) 1997 - [ 10 . ( 4^3 - 56) : 2^3 + 2^3 ] . 2005^0
= 1997 - [10 . ( 64 - 56) : 8 + 8 ] . 1
= 1997 - [ 10 . 8 : 8 + 8] . 1
= 1997 - 18 . 1
= 1979