1)  (27-514)-(486-78)

    =-487-408

   =-895

2)=40

3)=407

1. \(\left(27-514\right)-\left(486-78\right)\)

\(=\left(-487\right)-408\)

\(=-895\)

2. \(\left(65-100\right)-\left(25-100\right)\)

\(=\left(-35\right)-\left(-75\right)\)

\(=40\)

3. \(\left(567-67\right)-\left(56+4+33\right)\)

\(=500-93\)

\(=407\)

\(Cau1\left(27-514\right)-\left(486-78\right)\)

\(=\left(-487\right)-408\)

\(=-895\)

\(Cau2:\left(65-100\right)-\left(25-100\right)\)

\(=-35-\left(-75\right)\)

\(=40\)

\(Cau3:\left(567-67\right)-\left(56+4+33\right)\)

\(=500-\left(60+33\right)\)

\(=500-93\)

\(=407\)

(-233) + (-25 + 233) - (-100 + 75) 

= -233 + (-25) + 233 + 100 - 75

= -233 -25 + 233 + 100 -75

=(-233+233)-25+100-75

=0-25+100-75

=0

(-233)+(-25+233)-(-100+75)

=(-233)+(-25)+233-(-100)-75

=(-233+233)+(-25-75)-(-100)

=(-100)-(-100)

=(-100)+100

=0

115-(374+115)+(-65+374)

=115-374-115+(-65)+374

=(115-115)+(-374+374)+(-65)

=0+0+(-65)

=(-65)

a, -(-15+125-81)-(-85+75-19+100)

=-15-125+81-(-85)-75+19-100

=-140+81-(-85)-75+19-100

=-59-(-85)-75+19-100

=-16-75+19-100

=-91+19-100

=-72-100

=-172

a: 29+131+237+763

=160+1000

=1160

b: 65+327+15+73

=65+15+327+73

=80+400

=480

c: \(12+54:8-8\)

=12+3-8

=15-8

=7

d: \(45\cdot58+45\cdot42\)

\(=45\cdot\left(58+42\right)\)

\(=45\cdot100=4500\)

e: \(35\cdot34+35\cdot26+40\cdot35\)

\(=35\cdot\left(34+26+40\right)\)

\(=35\cdot100=3500\)

f: \(65\cdot25+65\cdot45+30\cdot65\)

\(=65\cdot\left(25+45+30\right)\)

\(=65\cdot100=6500\)

g: \(750:\left\lbrace32-\left\lbrack2^2+\left(5\cdot3^2-42\right)\right\rbrack\right\rbrace+100\)

\(=\frac{750}{32-\left\lbrack4+5\cdot9-42\right\rbrack}+100=\frac{750}{32-4-45+42}+100\)

\(=\frac{750}{28-3}+100\)

=750:25+100

=30+100

=130

h: \(\left\lbrace630:\left\lbrack16+3\cdot\left(6+3\cdot4\right)\right\rbrack\right\rbrace-1\)

\(=\frac{630}{16+3\cdot\left(6+12\right)}-1=\frac{630}{16+3\cdot18}-1\)

\(=\frac{630}{70}-1\)

=9-1=8

i: \(5871:\left\lbrack928-\left(247-82\right)\cdot5\right\rbrack+2175^0\)

\(=\frac{5871}{928-165\cdot5}+1\)

\(=\frac{5871}{928-825}+1=\frac{5871}{103}+1=57+1=58\)

k: \(375:\left\lbrace32-\left\lbrack4+\left(5\cdot3^2-42\right)\right\rbrack\right\rbrace-14\)

\(=\frac{375}{32-\left\lbrack4+5\cdot9-42\right\rbrack}-14\)

\(=\frac{375}{32-\left\lbrack4+45-42\right\rbrack}-14=\frac{375}{32-\left(4+3\right)}-14=\frac{375}{32-7}-14\)

\(=\frac{375}{25}-14\)

=15-14

=1

a) A= 100 - 116 : 4

=100-29

=71

b) B= 100 - [ 116 - (13 - 5)²]

=100-[116-8²]

=100-(116-64)

=100-52

=48

c) C= |- 65| + (- 42) + |65|

= 65+(-42)+65

= 88

a) (17.x - 25 ) : 8 = 92 : 65= 92/65

17x - 25 = 92/65.8

17x = 2361/65

x= 2361/65 : 17=2361/1105

b) x- 60 = 2017¹⁰¹ - 2017¹⁰⁰

   x-60 = 2017

        x = 2017 + 60

        x = 2077

c) 5x . 30-3x.x = 45

   5x.3x.x   = 45 + 30 = 75

   15x.x      = 75

B) 2017¹⁰⁰.(x-60)=2017¹⁰¹

x-60=2017¹⁰¹ : 2017¹⁰⁰

x-60 = 2017

x= 2017 + 60

x= 2077

C) 5.x+3.(10-x)+x=45

 5x+30 - 3x + x = 45

3x = 45-30

3x = 15

x= 5

A) (17x-25):8+65=9²

(17x-25):8 = 81 - 65

(17x-25):8 = 16

17x-25= 16:8

17x = 2+27

17x = 29

x= 29/17