matemática básica - expressÕes numÉricas

8/10/2019 Matemtica Bsica - EXPRESSES NUMRICAS

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EXPRESSES NUMRICAS

Para resolver uma expresso numrica, efetuamos as operaes obedecendo seguinte

ordem :

1) Potenciao e radiciao2) Multiplicaes e divises3) Adies e Subtraes

EXEMPLOS

1) 5 + 3 x 2 == 5 + 9 x 2 == 5 + 18 =

= 23

2) 7 - 4 x 2 + 3 == 498 + 3 == 41 + 3 == 44

H expresses onde aparecem os sinais de associao e que devem ser eliminados nestaordem:1) parnteses ( )2) colchetes [ ]3) chaves { }

exemplos

1) 40[5 + ( 2 - 7 )] == 40[5 + ( 8 - 7 )]= 40[25 + 1 ]== 4026 == 14

2) 50{ 15 + [ 4 : ( 102 ) + 5 x 2 ] } == 50{ 15 + [ 16 : 8 + 10 ]}== 50{ 15 + [ 2 + 10 ] } == 50{ 15 +12 } == 5027 == 23

3) exemplo

(-3) - 4 - (-1) + 594 + 1 + 25

5 + 1 + 256 + 25


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31

4) exemplo

15 + (-4) . (+3) -10151210310-7

5) exemplo

5 + 9 [(+20) : (-4) + 3]25 + 3[ (-5) +3 ]25 + 3 - [ -2]25 +3 +2

28 + 230

PRIORIDADE DAS OPERAES NUMA EXPRESSO ALGBRICA

Nas operaes em uma expresso algbrica, devemos obedecer a seguinte ordem:

1. Potenciao ou Radiciao2. Multiplicao ou Diviso3. Adio ou Subtrao

Observaes:

Antes de cada uma das trs operaes citadas anteriormente, deve-se realizar aoperao que estiver dentro dos parnteses, colchetes ou chaves.

A multiplicao pode ser indicada por x ou por um ponto . ou s vezes sem sinal,desde que fique clara a inteno da expresso.

Muitas vezes devemos utilizar parnteses quando substitumos variveis por valores

negativos.

EXERCICIOS

1) Calcule o valor das expresses:

a) 7 - 4 = (R:45)b) 2 + 10 = (R:18)c) 5 - 6 = (R:19)d) 4 + 7= (R:17)e) 5+ 5= (R:126)f) 2+ 2= (R:24)


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g) 10 - 10 = (R:900)h) 80 + 1= (R:81)i) 5 - 3 = (R:16)

j) 1+ 0= (R:1)

2) Calcule

a) 3 + 5 = (R:14)b) 3 + 5 = (R:28)c) 3 + 5 = (R:34)d) 5 - 3 = (R:16)e) 18 - 7= (R:17)f) 5 - 2 = (R:121)g) 10 + 10 = (R:110)h) 10 - 10 = (R:900)i) 10 - 1 = (R:999)

3) Calcule o valor das expresses

a) 2 x 5 + 3 = (R:49)b) 70+ 0- 1 = (R:0)c) 3 x 7 - 4 x 5= (R:17)d) 3- 2: 83 x 4 = (R:67)e) 5 + 3 x 24 = (R:27)f) 5 x 2 + 38 = (R:15)g) 5 - 3 x 2 - 1 = (R:12)h) 16 : 21 + 7 = (R:56)

4) calcule o valor das expresses:

a) 5 : ( 5 +1 -1)+ 4 x 2 = (R:13)b) (3 +1) +2 x 5 - 10= (R:25)c) c) 3: ( 41) + 3 x 2 = (R:15)d) 70[ 5 x (2 : 4) + 3] = (R:56)e) ( 7 + 4) x ( 3 - 2) = (R:11)f) 5 + 2 - 2 x (3 + 9) = (R:9)g) 6 : 3 + 4 x 1012 = (R:32)

h) (7 - 1 ) : 3 + 2 x 5 = (R:26)

5) calcule o valor das expresses:

a) 5 + 4- 1 = (R:20)b) 3- 6 + 2 = (R:83)c) 2- 3 + 1= (R:24)d) 10- 3 + 5 = (R:96)e) 11 - 3 + 5 = (R:117)f) 5 x 3 x 4 = (R:180)

g) 5 x 2 + 4 = (R:56)h) 5 x 2 - 12 = (R:488)


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a) ( 4 + 3) - 1 = (R:48)b) ( 5 + 1 ) + 10 = (R:46)

c) ( 97 ) x 8 = (R:64)d) ( 7 - 5) + ( 5 - 3 ) = (R:46)e) 6 : 2 - 1x 5 = (R:13)f) 3 x 2 + 2 x 5 = (R:172)


a) 4- 10 + (2 - 5) = (R:9)b) 30(2 + 1)+ 2 = (R:29)c) 30 + [6 : ( 53) + 1 ] = (R:49)d) 20[64 x( 10 - 3) + 1] = (R:17)

e) 50 + [ 3 : ( 1 + 2) + 4 x 3] = (R:71)f) 100[ 5 : (105 ) + 2x 1 ] = (R:79)g) [ 4 + ( 53)] : ( 97) = (R:3)h) 7+ 2 x[(3 + 1) - 4 x 1] = (R:73)i) 25 + { 3 : 9 +[ 3 x 53 x (2- 5)]} = (R:64)

8) Calcule as expresses:

a) ( 8 : 2) . 4 + {[(3 - 2) . 2- 5] . 4}= (R:76)b) ( 3 - 2) . 3 - 2 + 2 . 4 = ( R:83)c) ( 2- 3) . (2 - 2 ) = (R: 10)d) [2 . (10 - 4 : 2) + 6] : ( 2 - 2) = ( R:10)e) (184 . 2) . 3 + 2. 3 - 3 . ( 52) = (R: 51)f) 4 . [2: ( 102 + 8 ) ] + 2= (R: 17)g) [( 4 + 2 . 3) + ( 16 : 8) - 35] + 1- 10= (R : 9)h) 13 + ( 108 + (74)) = (R: 18)i) (10 . 4 + 18( 2 . 3 +6)) = (R:46)

j) 7 . ( 74( 4 + 7 . 10)) = (R: 0)k) ( 19 : ( 5 + 3 . 810)) = (R : 1)l) (( 2 + 2) . 3 -4) + 3 = (R: 77)m) 3 + 2 . [(3- 2) + ( 5 - 2)] + 1 = (R: 22)


a) 7( 1 + 3) = (R:3)b) 9( 51 + 2) =(R: 3)c) 10( 2 + 5 ) + 4 = (R: 7)d) ( 137 ) + 81 = (R: 13)e) 15( 3 + 2)6 = (R: 4)f) ( 104 )( 9 -8) + 3 =(R: 8)g) 50[ 37( 158 ) ] = (R: 20)h) 28 + [50(242) -10 ] = (R: 46)

i) 20 + [ 13 + (106) + 4] = (R: 41)j) 52{ 12 + [ 15( 84)]} = (R: 29)


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l) 25 + { 12 + [ 2( 86 ) + 2 ]} = (R: 39)m) { [ ( 183 ) + ( 7 + 5)2 ] + 5 }12 = (R:18)n) 65{ 30[ 20( 101 + 6) + 1 ]} =(R: 41)o)45 + { 15[ ( 108 ) + ( 74)3 ]4 } = (R:54)

p) 40 + { 50[35( 25 +5)1 ]} + 7 = (R:93)

q)38{ 20[ 22( 5 + 3) + ( 74 +1)]} = ( R:36)r) 26 + { 12[ ( 3018) + ( 41)6 ]1 } = (R::28)s) 25-[10 + (7 - 4)] = (R:12)t) 32+ [10-(9-4)+8] = (R:45)u)45-[12-4+(2+1)] = (R:31)v)70-{20-[10-(5-1)]} = (R:56)x) 28 + {13 - [6 -(4 + 1) + 2] - 1 } = (R:37)z) 53-{20-[30-(15-1+6) + 2 ]} = (R:45)


a) [-7+14 : (5 - 49 ) ] : 7b) [ -13 + 13 . ( -1 -3 . 2)] : 14c) -5[ (-5} - (-2 -9 ).5 ] : 10d) (-2) - [ -2 - 16 . ( 2 - 10) ] : 171e) 2 .[10-(3- 4 . 5) - 9] : 18f) 10[ 3 - (-2) - ( 48 : 2)] - 4g) [(133 .4) - ( 184 . 5)] : 3h) 100{[25 + ( -21 )] : 2 + 49} : 3i) 100{[30( 5 + 1)] : 6 + 81 } : 8

j) 72. [ 4 - ( 121 + 2 .26)]l) 42 . [ 4. ( 324 . 49 ) -1 ] : 63m) -5 + 2 .3 + 2 . 4n) -6 + 2 . (-2) + 5 . 7o) 10 + 2 . 2 - 5 . 49

p) 100 + 3 .(-3)- 2q) 11100 : (-10)r) -13 + (-800) : 80s) 52 . [ (-3) . (-26) : 4 + 15]t) (3 -2 . 9 ) : 5u) (32 .9) : (-5) : (-3)v) ( 72 .14) : (-21)( 52 ) : 3

x) [(72 . 14) : (-21)(52)] : 2z) [42 . (37)] : (-2) -5


a) 1[7(43 . 2 ) . (-11)] . 5b) 125 : (-5) : (-5)c) (-64) : (-4) : (-4)d) 5 + ( -3) + 1 = (R:15)e) 10 + (-2) -4 = (R:-2)f) 121 + (-4) = (R:27)

g) (-1)+ 39 = (R:-7)h) 18(+7) + 3 = (R:20)


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i) 6 + (-1)- 2 = (R:3)j) (-2) - 7(-1) = (R:-14)l) (-5) - 1 + (-1)= (R:-127)m) 5- ( -10) + 2 = (R:19)n) (-2) + (-3) - 25 = (R:-24)


a) 3 - 4 + 1 = (R:-12)b) 2 - 2 - 2 = (R:2)c) (-1)+ 5 - 3 = (R:-3)d) 5- 5 - 5= (R:-5)e) (-3). (+5) + 2 = (R:47)f) (-1)- (-1)= (R:-2)g) 5 + (-3) + 7= (R:15)h) 49 + 2 - 1 = (R:14)


a) (-3) + 5 = (R:14)b) (-8) - (-9) = (R:-17)c) -72+ (-1)= (R:0)d) (-12)+ (+12)= (R:2)e) 10 - (-10) - 10= (R:899)f) (-7) + (-6) - (-1) = (R:84)g) (-1)+ (+1)+ (-1)+ (+1) = (R:4)

h) 2

- 2

- 2

- 2 - 2 - 2 = (R:2)14) Calcule o valor das expresses:

a) (-3) . (+7) + (-8) . (-3) = (R:3)b) (-3) + (+2) - 7 = (R:-30)c) 8 + (-3 -1) = (R:24)d) (-2 + 6) : (+35) = (R:16)e)(-5) + (-7 + 4) = (R:-28)f) (-2)+ (+5) . (-2) = (R:54)


a) (-3) . (-2) + (3) + 5= (R:-110)b) (-1) + 3 + (+2) . (+5) = (R:12)c) (-2) . (-7) + (-3) = (R:23)d) 2 . (-5) - 3 . (-1) + 4 = (R:57)e)[ -1 + (-3) . (-2)] = (R:-25)f)(57) - [ 5 - 2 - (46)] = (R:5)g) (-3 + 21) - ( -3 + 51)+ 3 = (R:-6)h) 8[ -7 + )-1) . (-6) + 4]= (R:-1)i) 14[(-1) . (-2) + (-35) : (+5)] = (R:25)

j) 5 - [ 10 + (7 -8) ] - 4 + 2 = (R:8)k) (-1)+ 6- [15 + (-40) : (-2) ] = (R:-18)


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l) -3{ -2[(-35) : (+5) + 2 ]} = (R:-4)


a) (- 3 + 5 + 2) : (-2) = (R:-2)

b) (+31) - 15 = (R:-11)c) (-2) - (-1 + 2)= (R:-9)d) 40 : (-1)+ (-2) - 12 = (R:-60)e) 10[5(-2) + (-1)] = (R:4)f) 2{ 3 + [ 4(12) + 3 ]4} = (R:-5)g) 15[ (-5) - (10 - 2 ) ] = (R:-8)h) 13[(-2)(-7) + (+3) ] = (R:-1)i) 7 - [ 6(-1)- 2] = (R:46)

j) 2 - [(-16) : (+2)(-1)] = (R:15)k) 50 : { -5 + [ -1(-2): (-2) ]} = (R:-5)


a) 10 + (-3) = (R:19)b) (-4) - 3 = (R:13)c) 1 + (-2) = (R:-7)d) -2 + (-5) = (R:23)e) (-2) + (-3) = (R:-23)f) 15 + (-1)- 2 = (R:12)g) (-9) -2(-3) = (R:82)h) 5 + (-2) + 6 = (R:3)


a) 5{ +3[(+2) -(-5) + 64 ]} = (R:-17)b) 15{ -3 + [(56) . (9 -8 ) + 1]} = (R:16)c) 18{ 6[ -3(54)(7- 9) ]1 } = (R:17)d) -2 + { -5[ -2(-2) - 3- (3 -2 )] + 5 } = (R:-4)e) 4{(-2) . (-3)[ -11 + (-3) . (-4)](-1)} = (R:16)

19) Efetue as subtraes:

a) (+5/7)(+2/3) = (R: 1/21)b) (+2/3)(+1/2) = (R: 1/6)c) (+2/3)(+4/5) = (R: -2/15)d) (-7/8)(-3/4) = (R: -1/8)e) (-2/5)(-1/4) = (R: -3/20)f) (-1/2)(+5/8) = (R: -9/8)g) (+2/3)( (+1/5) = (R: 7/15)h) (-2/5)( +1/2) = (R: -9/10)

20) Efetue as subtraes:

a) (+1/2)(+5) = (R: -9/2)b) (+5/7)(+1) = (R: -2/7)


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c) 0( -3/7) = (R:3/7)d) (-4)(-1/2) = (R: -7/2)e) (+0,3)(-1/5) = (R: )f) (+0,7)(-1/3) = (R:31/30)

21) Calcule

a) -1 = (R: -7/4)b) (-3/5) + (1/2) =(R: -1/10)c) 2 -1/4 = (R: 5/4)d) -3 -4/5 + = (R: -33/10)e) 7/3 + 2 -1/4 = (R: 49/12)f) -3/2 + 1/6 + 2 -2/3 = (R: 0)g) 1 + - 1/8 = (R:5/8)h) 0,2 + + - = (R:6/5)i) + (-0,3) + 1/6 = (R:11/30)

j) 1/5 + 1/25 + (-0,6) = (R: 1/10)

22) Calcule o valor de cada expresso:

a) 3/512/5 = (R: -4/5)b) 3/50,2 + 1/10 = (R: )c) -324/3 = (R: -19/3)d) 41/10 + 2/5 = (R: 43/10)e) 2/3 -5 = (R: 29/6)f) -5/121/12 + 2/3 = (R: 1/6)

23) Calcule o valor de cada expresses:

a) -1/3 + 2/94/3 = (R: -13/9)b) -4 + - 1/6 = (R:-11/3)c) 0,3 + - = (R: 1/20)d) 1 + - 3/2 + 5/8 = (R: 3/8)e) 0,1 + 3/2 + 2 = (R: 67/20)f) + 0,25/20,5 = ( R: - 41/20)

24) Calcule o valor de cada expresso

a) 1/2(-3/5) + 7/10 = (R: 9/5)b) -(-1)(- 4/3) + 5/6 = (R: 19/6)c) 2( - 2/3) + 0,1 = (R: 181/60)d) ( -1 + )( -1/6 + 2/3) = (R: -1)e) 2[ 3/5( -1/2 + ) ] = (R: 23/20)f) 3[ -1/2(0,1 + )] = (R: 77/20)g) (1/3 + )(5/6.- ) = (R: )h) (5/21/3 )(1/2 + 1) = (R: -1/12)i) (1/4 + + 2 ) + (-1/6 + 2/3) = (R: 13/4)

j) (-0,3 + 0,5 )( -2 - 4/5) = (R: 3)

k) (1/6 + 2/3)(4/103/5) + 1/3 = (R: 41/30)l) 0,2 + (2/3)( -7/12 + 4/3) = (R: -2/15)


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m) (1) + (2 + )(1 - 1/3)( 2 ) = (R: 5/6)


a) 30-(5+3) = (R: 22)b) 15+(8+2) = (R: 25)c) 15-(10-1-3) = (R: 9)d) 23-(2+8)-7 = (R: 6 )e) (10+5)-(1+6) = (R: 8)f) 7-(8-3)+1= (R: 3 )


a) 25-[10+(7-4)] = (R:12)

b) 32+[10-(9-4)+8] = (R:45)c) 45-[12-4+(2+1)] = (R:34)d) 70-{20-[10-(5-1)]} = (R:56)e) 28+{13-[6-(4+1)+2]-1} = (R:37)f) 53-{20-[30-(15-1+6)+2]} = (R:45)g) 62-{16-[7-(6-4)+1]} =(R:52)h) 20-{8+[3+(8-5)-1]+6} = (R:1)i) 15+{25-[2-(8-6)]+2} = (R:42)j) 56-[3+(8-2)+(51-10)-(7-2)] =(R:11)l){42+[(45-19)-(18-3)+1]-(28-15)-1} = (R:)

27) Calcule o valor da expresses

a) 7-(1+3)= (R:3)b) 9-(5-1+2)= (R:3)c) 10-(2+5)+4= (R:7)d) (13-7)+8-1= (R:13)e) 15-(3+2)-6= (R:4)f) (10-4)-(9-8)+3= (R:8)g) 50-[37-(15-8)]= (R:20)h) 28+[50-(24-2)-10]= (R:46)

i) 20+[13+(10-6)+4]= (R:41)j) 52-{12+[15-(8-4)]}= (R:29)


a) 25 + { 12 + [ 2 ( 8 6 ) + 2 ]} = (R:39)b) { [ ( 18 3 ) + ( 7 + 5) 2 ] + 5 } 12 = (R:18)c) 65 { 30 [ 20 ( 10 1 + 6) + 1 ]} = (R: 41)d)45 + { 15 [ ( 10 8 ) + ( 7 4) 3 ] 4 } = (R:54)e) 40 + { 50 [35 ( 25 +5) 1 ]} + 7 = (R:93)f)38 { 20 [ 22 ( 5 + 3) + ( 7 4 +1)]} = ( R:36)

g) 26 + { 12[ ( 30

18) + ( 4

1)

6 ]

1 } = (R:28)


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a) 10 - 5 - 2 + 3 = (R: 6)b) 10 - ( 5 + 2) + 3 = (R:6)c) ( 10 - 5) - ( 2 + 3) = ( R: 0)

d) 10 - ( 5 - 2 + 3) = ( R: 4)e) ( 17 + 9 ) - 8 - ( 11 + 4) = (R: 3)f) 86 + ( 31 - 16 + 60 ) - ( 200 - 70 - 50 ) = ( R: 81)g) ( 79 + 21 - 84) + ( 63 - 41 + 17 ) - 26 = ( R: 29)


a) 10 1 + 8 4 = (R 13)b) 12 8 + 9 3 = (R: 10)c) 25 1 4 7 = ( R: 13)d) 30 ( 5 + 3 ) = ( R: 22)

e) 15 + ( 8 + 2 ) = (R: 25)f) 25 ( 10 1 3 ) = (R: 19)g) 45 18 + 3 + 1 2 = ( R: 29)h) 75 10 8 + 5 1 = (R: 61)i) 10 + 5 6 3 3 + 1 = (R: 4)j) 23 ( 2 + 8 ) 7 = (R: 6)k) ( 10 + 5 ) ( 1 + 6 ) = ( R: 8)l) 7 ( 8 3 ) + 1 = (R: 3)m) 25 [ 10 + ( 7 4 ) ] = (R: 12)n)32+ [ 10 ( 9 4 ) + 8 ] =-(R: 45)

o) 45

[ 12

4 + ( 2 + 1 )] =(R: 34)p) 70 { 20 [ 10 ( 5 1 ) ]} = (R: 56)q) 28 + { 13 [ 6 ( 4 + 1 ) + 2 ] 1 } = ( R: 37)r) 53 { 20 [ 30 ( 15 1 + 6 ) + 2 ]} =(R: 45)s) 62 { 16 [ 7 ( 6 4 ) + 1 ]} = (R: 52)t) 20 { 8 + [ 3 + ( 8 5 ) 1 ] + 6} = (R: 1)u) 15 + { 25 [ 2 ( 8 6 )] + 2 } = ( R: 42)v) 56 [ 3 + ( 8 2 ) + ( 51 10 ) ( 7 2 )] = (R: 1)w) { 42 + [ (45 19) ( 18 3 ) + 1 (28 15 ) ]} = (R: 41)x) 7 ( 1 + 3 ) =(R: 3)y) 9 ( 5 1 + 2 ) = (R: 3)

z) 10( 2 + 5 ) + 4 = (R: 7)


a) 16+[10-(18:3+2)+5] =(R: 23)b) 25-[12-(3x2+1)] =(R: 20)c) 90-[25+(5x2-1)+3] = ( R: 53)

d) 45+[(8x5-10:2)+(18:6-2)] = (R: 81)e) 50-2x{7+8:2-[9-3x(5-4)]} = (R: 40)


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f) 100-3x{5+8:2-[3x(7-6)]} = (R: 82)

32) Determine o valor de cada expresso

a) 1000 - [(2 . 4 - 6) + ( 2 + 6 . 4)] = (R: 972)

b) 60 + 2 . {[ 4 . ( 6 + 2 ) - 10 ] + 12} = ( R: 128 )c) [( 4 + 16 . 2) . 5 - 10] . 100 = (R: 17.000)d) { 10 + [ 5 . ( 4 + 2 . 5) - 8] . 2 } - 100 = ( R: 34)e) 80 - 5 . ( 28 - 6 . 4 ) + 6 - 3 . 4 =(R: 54)

33) Calcule

a) 4 . ( 10 + 20 + 15 + 30) =(R: 300)b) (10 . 6 + 12 . 4 + 5 . 8 ) - 40 =(R: 108)c) [ 6 . ( 3 . 4 - 2 . 5) - 4 ] + 3 . ( 4 - 2) - ( 10 : 2 ) = (R: 9)d) 67 + { 50 . [ 70 : ( 27 + 8 ) + 18 : 2 ] + 21 } = (R:638)

e) [ 30 . ( 9 - 6)] + { 30 : ( 9 + 6 ) ] =(R: 92)f) 58 - [ 20 - ( 3 . 4 - 2) : 5 ] =(R: 40)g) 40 + 2 . [ 20 - ( 6 + 4 . 7 ) : 2 ] = ( R: 46)


a) (12 + 2 . 5) - 8 = (R: 14)b) 25 - ( 15 + 6 : 3) =(R: 8)c) 25 +[7 + ( 8 - 4 :2)] = (R: 38)

d) 60 - [8 + ( 10 - 2 ) : 2] =(R: 46)e) 80 - [ 22 + ( 5 . 2 - 1 ) + 6] = (R: 43)f) 14 : 2 + [ 13 - ( 4 . 2 + 1 ) ] =(R: 11)g) [ 30 + 2 x ( 5 3 ) ] x 2 10h) 20 : 10 + 10i) 10 + [ 4 + ( 7 x 3 + 1 ) ] 3

35) Resolva as expresses numricas:

a) 8 ( 1 + 3) = (R: 4)

b) 7x 32 x 5 = (R: 11)

c) ( 13 7 ) + 8 1 =(R : 13)d)4 x 3 + 10 : 2 =(R: 17)e) 15 ( 3 + 2 ) 6 = (R: 4)f) 40 2 x 4 + 5 = (R: 37)g) ( 10 4 ) ( 9 8 ) + 3 =(R: 8)h) 50 16 : 8 + 7 =( R: 55)i) 50 [37 ( 15 8 ) ] = (R: 20)j) 32 : 4 : 2 : 2 = (R: 2)l) 28 + [ 50 ( 24 2 ) 10 ] = (R: 46)m) ( 13 + 2) x 3 + 5 =(R: 50)

n) 20 + [ 13 + ( 106 ) + 4 ] =(R: 18)

o) 52 { 12 + [ 15 ( 8 4 )]}: (R: 41)


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p) ( 7 + 2 ) x ( 3 1 ) =q) ( 4 + 2 x 5 ) 3r) 7 + 15 : 3s) 20 ( 15 + 6 : 3)t) 4 x 5 + 1

u) 15 + [ 6 + ( 84 : 2 )]

v) 10 : 2 + 8x) 40 [ 3 (10 2 ) : 2 ]z) 32 + 12 : 2

Exerccios em forma de teste:

1) O resultado de (-1001) :a) 11 011

b) -11 011c) 1 002 001xd) -1 002 001

2) O valor da expresso 2- 2 - 2 :

a) -4b) -5xc) 8d) 0

3) O valor da expresso (-10) - 10 :

a) 0xb) 40c) -20d) -40

4) O valor da expresso 16 - 4

a) 2 xb) 4


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c) 6d) 12

5) O valor da expresso 10 + 9 1 :

a) 14b) 18c) 12 xd) 20

6) O valor da expresso (-4)- (-4) :

a) 20b) -20c) 252d) 260x

7) O valor da expresso (-2)+ (-9)- (-3) :

a) 8 xb) 12c) 16d) -26

8) O valor da expresso (-7) + (+3) . (-4)(-5) :

a) 7b) 37c) 42x

d) 47

9) A expresso (-7): (-7) igual a:

a) (-7)xb) (-7)c) (-7)d) (-1)

10) O valor da expresso[-2 + (-1) . (-3)] :


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a) -1xb) -4c) 1

d) 4

11) O valor da expresso numrica -4 + (3 -5) . (-2) + 3 - (-2)

a) 7b) 8c) 15d) -7 x

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