Đáp án:
Giải thích các bước giải:
11/
2^2.3^2-5.2.3
=4.9-5.2.3
=36-30
=6
12/
3^2.5-2^2.7+1.5
=9.5-4.7+1.5
=45-28+5
=17+5
=22
13/
5^2.2-3^2.4
=25.2-9.4
=50-36
=14
14/
7^2.3-5^2.3
=49.3-25.3
=147-75
=72
15/
2^3.3^2-4^2.3
=8.9-16.3
=72-48
=24
16/
5^2.2^3+3^2.7-8^2.2
=25.8+9.7-64.2
=200+63-128
=263-128
=135
17/
(5.2^2-20):5+3^2.6
=(5.4-20):5+9.6
=(20-20):5+9.6
=0:5+54
=0+54=54
18/
(24.5-5^2.2):(5.2)-3
=(120-50):10-3
=70:10-3
=7-3
=4
19/
[(5^2.2^3-7^2.2):2].6-7.2
=[(25.8-49.2):2].6-7.2
=[(200-98):2].6-7.2
=[102:2].6-7.2
=51.6-7.2
=306-14
=292
20/
(6.5^2-13.7).2-2^3.(7+3)
=(6.25-13.7).2-8.(7+3)
=(150-91).2-8.(7+3)
=59.2-8.10
=118-80
=38
NO COPY
