# multiplicaoedivisodeinteiros-110327170156-phpapp01

Propaganda
```Exerc&iacute;cios 23 ao 25
Na multiplica&ccedil;&atilde;o a regra do jogo do sinal &eacute; a
mesma:
Sinais iguais =
(+)x(+)=+
(–)x(–)=+
+
Sinais diferentes = –
(+)x(–)=–
(–)x(+)=–
Nos casos em que o n&uacute;mero de fatores negativos for par, o
resultado ser&aacute; positivo. Caso o n&uacute;mero de fatores negativos
seja impar, o resultado ser&aacute; negativo.
Exemplos:
(+3) x (–2) x (–3) x (+2) = + 36 (dois fatores negativos)
(–2) x (+5) x (+3) x (+2) = – 90 (um fator negativo)
(–3) x (–2) x (–2) x (–4) = + 48 (quatro fatores negativos)
(–2) x (–3) x (–1) x (+2) = – 12 (tr&ecirc;s n&uacute;meros negativos)
Exerc&iacute;cios 23 ao 25
23
23
24
(– 4 ) . ( + 2)
–8
(– 12 ) . ( + 2)
– 24
(+ 16 ) . (– 3 )
– 48
(+ 4 ) . ( +4)
+ 16
( + 4) . ( + 4) . ( + 4)
32
(– 12 ) . (– 8)
96
25
– 5 + (– 24)
– 5 – 24
– 29
(– 4 ). (– 6)
+ 24
(– 30) – (– 12)
– 30 + 12
–18
6 – (– 2) . (+ 4)
6 – (– 8 )
6+8
14
(+ 12) + (– 30 )
+ 12 – 30
–18
12 – (–6) + (+ 20 )
12 + 6 + 20
38
9 – [ (–14 ) – ( –24 ) ]
9 – [ – 14 + 24 ]
9 – [ + 10 ]
9 – 10
–1
(– 6) + { 2 . [– 3 + ( + 8 )]}
– 6 + { 2 . [– 3 + 8]}
– 6 + { 2 . 5}
– 6 + 10
4
Exerc&iacute;cios 26 e 27
( 16 ) : (– 8)
– 2
(– 24 ) – (– 5)
– 24 + 5
– 19
( – 20 ) : ( – 5)
+4
[ – 8 + ( + 12) ] : ( – 2 )
[ – 8 + 12 ] : ( – 2 )
[ + 4 ] : ( – 2)
–2
(– 8 + 3 ) : [ – 3 . ( + 1) + 8]
( – 5) : [ – 3 + 8]
( – 5) : [ + 5]
–1
– 20 : { – 6 + [(+ 6) : (+ 2)] – 2}
– 20 : { – 6 + [+ 3] – 2}
– 20 : { – 6 + 3 – 2}
– 20 : { – 5}
+4
10 – { – 6 + [(+ 4) – 8]}
10 – { – 6 + [– 4]}
10 – { – 6 – 4}
10 – {– 10}
10 + 10
20
[ – 20 + ( – 8 )] : [ 1 + ( + 6 )]
[ – 20 – 8 ] : [ 1 + 6 ]
[ – 28 ] : [ 7 ]
–4
P&aacute;ginas 108 a 118.
Ex.: 39, 44, 46, 50, 51, 55, 56, 57, 63, 67, 68 e 71
```