( 5 19 .  5 14 ) :  5 32 =  5 33 :  5 32  = 5

a) 31 . { 330 : [178 – 4 . ( 35 – 21 : 3 )]} = 31 . { 330 : [178 – 4 . ( 35 – 7)]}

= 31 . { 330 : [178 – 4 . 28]} = 31 . { 330 : [178 – 112]}

= 31 . { 330 : 66 } = 31 . 5 = 155

b) ( 5 19  .  5 14 ) :  5 32  =  5 33 :  5 32 = 5

a: \(A=38\cdot66-38\cdot56+62\cdot65-62\cdot55\)

\(=38\cdot\left(66-56\right)+62\left(65-55\right)\)

\(=38\cdot10+62\cdot10=10\cdot100=1000\)

b: \(B=11070:15\cdot\left\lbrack356-\left(2021-2011\right)\right\rbrack\)

\(=738\cdot\left\lbrack356-10\right\rbrack=738\cdot346=255348\)

c: C=2015+[(44+2-8):2]

=2015+[(44-6):2]

=2015+38:2

=2015+19

=2034

d: \(D=31:\left\lbrace330:\left\lbrack178-4\cdot\left(35-21:3\right)\right\rbrack\right\rbrace\)

\(=31:\left\lbrace330:\left\lbrack178-4\cdot\left(35-7\right)\right\rbrack\right\rbrace\)

=31:{330:[178-4*28]}

=31:{330:66}

=31:5

=6,2

f: \(F=3597\cdot34+3597\cdot65+3597\)

\(=3597\cdot\left(34+65+1\right)\)

\(=3597\cdot100=359700\)

\(3^3\cdot5^3-20\cdot\left\{300-\left[546-2^3\cdot\left(7^8-7^6+7^0\right)\right]\right\}\)

\(=3^3\cdot5^3-20\cdot\left\{300-\left[546-2^3\cdot5647153\right]\right\}\)

\(=3^3\cdot5^3-20\cdot\left\{300-\left[546-45177224\right]\right\}\)

\(=3^3\cdot5^3-20\cdot\left\{300--45176678\right\}\)

\(=3^3\cdot5^3-20\cdot45176978\)

\(=3375-903539560\)

\(=-903536185\)

\(626500:\left\{50^2:\left[178-4\cdot\left(35-21:3\right)\right]\right\}\)

\(=626500:\left\{50^2:\left[178-4\cdot\left(35-7\right)\right]\right\}\)

\(=626500:\left\{50^2:\left[178-4\cdot28\right]\right\}\)

\(=626500:\left\{50^2:\left[178-112\right]\right\}\)

\(=626500:\left\{50^2:66\right\}\)

\(=626500:\frac{1250}{33}\)

\(=\frac{82698}{5}\)

CHUC BAN HOC TOT >.<

a.\(\frac{5}{4}+\frac{3}{7}-\frac{1}{2}=\frac{35+12-14}{28}\)\(=\frac{33}{28}\)

=(441.14.125):42875.6=(6174.125):42875.6=771750:42875.6=18.6=108

a) 31 . 65 + 31 . 35 - 500

=31(65+35)-500

=31..100-500

=3100-500

=2600

a, 31.56+31.35-500

=31(65+35)-500

=3100-500

=2600