a) 47 – [(45.2^4 – 5^2.12):14] b) 50 – [(20 – 2^3) : 2 + 34] c) 10^2 – [60 : (5^6 : 5^4 – 3.5)] d) 50 – [(50 – 2^3.5):2 + 3] e) 10 – [(8^2 – 48).5 + (2^3.10 + 8)] : 28 f) 8697 – [3^7 : 3^5 + 2(13 – 3)] g) 2011 + 5[300 – (17 – 7)^2] h) 695 – [200 + (11 – 1)^2] i) 129 – 5[29 – (6 – 1)^2] j) 2010 – 2000 : [486 – 2(7^2 – 6)] ^ là mũ nha VD 2^2 đọc là 2 mũ 2

a)

47-[(45.2^4-5^2.12):14]

=47-[(45.16-25.12):14]

=47-[(720-300):14]

=47-[420:14]

=47-30

=17

b)

50-[(20-8):2+34]

=50-[ 12:2+34]

=50-[6+34]

=50-40

=10

c)

100-[60:(5^2-3.5)]

=100-[60:(25-15)]

=100-[60:10]

=100-6

=94

d)

50-[(50-8.5):2+3]

=50-[(50-40):2+3]

=50-[10:2+3]

=50-[5+3]

=50-8

=42

e)

10-[(64-48).5+(8.10+8)]:28

=10-[16.5+88]:28

=10-[80+88]:28

=10-168:28

=10-6

=4

f)

8697-[3^2+2.(13-3)]

=8697-[9+2.10]

=8697-[9+20]

=8697-29

=8668

g)

2011+5.[300-10^2]

=2011+5.[300-100]

=2011+5.200

=2011+1000

=3011

h)

695-[200+10^2]

=695-[200+100]

=695-300

=395

i)

129-5.[29-5^2]

=129-5.[29-25]

=192-5.4

=192.20

=3840

g)

2010-2000:[486-2.(49-6)]

=2010-2000:[486-2.43]

=2010-2000:[486-86]

=2010-2000:400

=2010-5

=2005

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