Đáp án:
a) 5 . 2² - 18 : 3²
= 5. 4 - 18 : 9
=18
b) 17 . 85 + 15 . 17 - 120
= 1445 + 255 - 120
= 1670 - 120
= 1500
c) 2³ . 17 . 2³ . 14
= 8 . 17 . 8 .14
= 136 . 112
= 15232
d) 20 - [ 30 - ( 5 - 1 )² ]
= 20- [ 30- 16]
= 20-14
=6
e) 75 - ( 3 . 5² - 4 . 2² )
= 75 - ( 3. 25 - 4.4)
= 75 - ( 75 -16)
= 75 - 59=16
g) 150 + 50 : 5 - 2 . 3²
= 150 + 10 -2 . 9
= 160 - 18=142
f) 2 . 5² + 3 : 71⁰ - 54 : 3³
= 2.25 + 3: 1-54:9
= 50 + 3-6=47
h) 5 . 3² - 32 : 4²
= 5.9-32:16
= 45-2=43