Question

Tính giá trị biểu thức 

a) [545-(45+4.25)]:50-2000:250+2¹⁵:2¹³

b) [504-(25.8+70)]:9-15+9⁰

c)5.{26-[3.(5+2.5)+15]:15}

d)16:{400:[200-(37+46.3)]}                                    

e) 12:{390:[500-(125+35.7)]}

g) 12000-91500.2+1800.3+1800.2:3                                     

j){[126(36-31)².2]-9}.1001

g)[(14+3).2-5].9.1-325

f)[(46-32)²-(54-42)² ] 36-1872

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Answer 1

a.\(\left[545-\left(45+4.25\right)\right]:50-2000:250+2^{15}:2^{13}\)

=\(\left[545-145\right]:50-8+2^2\)

=\(400:50-8+4\)

=8-8+4

=4

Answer 2

b.\(\left[504-\left(25.8+70\right)\right]:9-15+9^0\)

=\(\left[504-270\right]:9-15+1\)

=234:9-14

=26-14

=12

Answer 3

c.\(5\left\{26-\left[3\left(5+2.5\right)+15\right]:15\right\}\)

=\(5\left\{26-\left[3.15+15\right]:15\right\}\)

=5{26-60:15}

=5.{26-4}

=5.22

=110

Answer 4

d. 16:{400:[200-(37+46.3)]}

=16:{400:[200-175]}

=16:{100:25}

=16:4

=4

Answer 5

e. 12:{390:[500-(125+35.7)]}

=12:{390:[500-370]}

=12:{390:130}

=12:3

=4

Answer 6

G. 12000-91500.2+1800.3+1800.2:3

=12000-183000+5400+1200

=-164400

Answer 7

J. {[126(36-31)^2 .2]-9}.1001

={[126.5^2.2]-9}.1001

={[6300-9].1001

=6291.1001

=6297291

Answer 8

g. [(14+3).2-5].9.1-325

=[17.2-5].9-325

=29.9-325

=-64

 

Answer 9

F. [(46-32)^2-(54-42)^2].36-1872

=[14^2-12^2].36-1872

=52.36-1872

=0