ATIVIDADE PRÁTICA - 1 – Calcule o valor das expressões:
a) 10 – 1 + 8 – 4
b) 12 – 8 + 9 – 3
c) 25 – 1 – 4 – 7
d) 45 – 18 + 3 + 1 – 2
e) 75 – 10 – 8 + 5 – 1
f) 10 + 5 – 6 – 3 – 3 + 1
2 – Resolva as expressões com parênteses:
a) 30 – ( 5 + 3 )
b) 15 + ( 8 + 2 )
c) 25 – ( 10 – 1 – 3 )
d) 23 – ( 2 + 8 ) – 7
e) ( 10 + 5 ) – ( 1 + 6 )
f) 7 – ( 8 – 3 ) + 1
3 – Resolva as expressões com parênteses, colchetes e chaves:
a) 25 – [ 10 + ( 7 – 4 ) ]
b) 32 + [ 10 – ( 9 – 4 ) + 8 ]
c) 45 – [ 12 – 4 + ( 2 + 1 ) ]
d) 70 – { 20 – [ 10 – ( 5 – 1) ] }
e) 28 + { 13 – [ 6 – ( 4 + 1 ) + 2 ] – 1 }
f) 53 – { 20 – [ 30 – ( 15 – 1 + 6 ) + 2 ] }
g) 62 – { 16 – [ 7 – ( 6 – 4 ) + 1 ] }
h) 20 – { 8 + [ 3 + (8 – 5 ) – 1 ] + 6 }
i) 15 + { 25 – [ 2 – ( 8 – 6 ) ] + 2 }
j) 56 – [ 3 + ( 8 – 2 ) + ( 51 – 10 ) – ( 7 – 2 ) ]
k) { 42 + [ ( 45 – 19 ) – ( 18 – 3 ) + 1 ] – ( 28 – 15 ) – 1 }
Soluções para a tarefa
Resposta:
a) 10 – 1 + 8 – 4 =13
b) 12 – 8 + 9 – 3 =10
c) 25 – 1 – 4 – 7 =13
d) 45 – 18 + 3 + 1 – 2 =29
e) 75 – 10 – 8 + 5 – 1 =61
f) 10 + 5 – 6 – 3 – 3 + 1= -1
2.a) 30 – ( 5 + 3 )=
=30-8
=22
b) 15 + ( 8 + 2 )=
=15+10
=25
c) 25 – ( 10 – 1 – 3 )=
=25-6
=19
d) 23 – ( 2 + 8 ) – 7=
=23-10-7
=23-17
=6
e) ( 10 + 5 ) – ( 1 + 6 )=
=15-7
=8
f) 7 – ( 8 – 3 ) + 1=
=7-5+1
=3
3.a) 25 – [ 10 + ( 7 – 4 ) ]=
=25-[10+3]
=25-13
=12
b) 32 + [ 10 – ( 9 – 4 ) + 8 ]=
=32+[10-5+8]
=32+13
=45
c) 45 – [ 12 – 4 + ( 2 + 1 ) ]=
=45-[12-4+3]
=45-11
=34
d) 70 – { 20 – [ 10 – ( 5 – 1) ] }=
=70-{20-[10-4]}
=70-{20-6}
=70-14
=56
e) 28 + { 13 – [ 6 – ( 4 + 1 ) + 2 ] – 1 }=
=28+{13-[6-5+6+2]}
=28+{13-9}
=28+4
=32
f) 53 – { 20 – [ 30 – ( 15 – 1 + 6 ) + 2 ] }=
=53-{20-[30-20+2]}
=53-{20-12}
=53-8
=45
g) 62 – { 16 – [ 7 – ( 6 – 4 ) + 1 ] }=
=62-{16-[7-2+1]}
=62-{16-6}
=62-10
=52
h) 20 – { 8 + [ 3 + (8 – 5 ) – 1 ] + 6 }=
=20-{8+[3+3-1]+6}
=20-{8+5+6}
=20-19
=1
i) 15 + { 25 – [ 2 – ( 8 – 6 ) ] + 2 }=
=15+{25-[2-2]+2}
=15+{25-0+2}
=15+27
=42
j) 56 – [ 3 + ( 8 – 2 ) + ( 51 – 10 ) – ( 7 – 2 ) ]=
=56-[3+6+41-5]56-45
=11
k) { 42 + [ ( 45 – 19 ) – ( 18 – 3 ) + 1 ] – ( 28 – 15 ) – 1 }=
={42+[26-15+1]-13-1}
=42+12-13-15}
=26
ESPERO TER AJUDADOOOOO
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