Respuestas
Explicación paso a paso:
Actividad 1:
a) [9 - 15 ÷ (-3)] × (-2) - 7 × (-6 ÷ 2)
[9 - 15 ÷ - 3] × - 2 - 7 × -3
[9 - - 5] × - 2 - - 21
[9+5] × - 2 + 21
14 × - 2 +21
- 28 +21
- 7
b) [-8 + 12 ÷ (-4)] × (-2) + (-10) × (-1 - 1)
[-8 + - 3] × (-2) + (-10) × (-2)
[-8 - 3] × (-2) + 20
- 11 × - 2 +20
22 + 20
42
c) [4 - (-6) ÷ 2] × (-1 - 2) + 16 ÷ (-2) - 3
[4 - - 3] × - 3 + - 8 - 3
[4 + 3] × - 3 - 8 - 3
7 × - 3 - 11
- 21 - 11
- 32
d) (-5 + 3) × [-20 - 4 × (-5)] - (-20) ÷ 10
(-2) × [-20 + 20] - - 2
(-2) × 0 +2
0 + 2
2
Actividad 2:
a) [-2 + (-2) × (-3)] × (-8 - 9 ÷ 3)
[-2 + 6] × (-8 - 3)
4 × 3
12
b) [-3 × 2 - 8 ÷ (-2)] × (-1)
[-6 + 4] × (-1)
- 2 × - 1
2
Respuesta:
Explicación paso a paso:
SOLUCION:
ACTIVIDAD EXTRA N° 2
Arma tus ejercicios combinados, reemplazando el valor de las letras. Luego resuelve el ejercicio obtenido.
A = 2 B = - 3 C = 8 D = - 9
a) [ - A + ( - 2 ) . B ] ( - C - D ÷ 3 ) =
- reemplazamos -
[ - ( 2 ) + ( - 2 ) . ( - 3 ) ] ( - ( 8 ) - ( - 9 ) ÷ 3 ) =
= [ - 2 - 2 . ( - 3 ) ] ( - 8 + 9 ÷ 3 )
= [ - 2 + 6 ] ( - 8 + 3 )
= [ + 4 ] ( - 5 )
= - 20
b) [ - 3 . A - C ÷ ( - 2 ) ] . ( - 1 ) =
- reemplazamos -
[ - 3 . ( 2 ) - ( 8 ) ÷ ( - 2 ) ] . ( - 1 ) =
= [ - 6 + 4 ] . ( - 1 )
= [ - 2 ] . ( - 1 )
= + 2
ACTIVIDAD EXTRA N° 1
a) [ 9 - 15 ÷ ( - 3 ) ] . ( - 2 ) - 7 . ( - 6 ÷ 2 ) =
= [ 9 + 5 ] . ( - 2 ) - 7 . ( - 3 )
= [ + 14 ] . ( - 2 ) + 21
= - 28 + 21
= - 7
b) [ - 8 + 12 ÷ ( - 4 ) ] . ( - 2 ) + ( - 10 ) - ( - 1 - 1 ) =
= [ - 8 - 3 ] . ( - 2 ) - 10 - ( - 2 )
= [ - 11 ] . ( - 2 ) - 10 + 2
= + 22 - 10 + 2
= + 22 + 2 - 10
= + 24 - 10
= + 14
c) [ 4 - ( - 6 ) ÷ 2 ] . ( - 1 - 2 ) + 16 ÷ ( - 2 ) - 3 =
= [ 4 + 6 ÷ 2 ] . ( - 3 ) - 8 - 3
= [ 4 + 3 ] . ( - 3 ) - 11
= [ + 7 ] . ( - 3 ) - 11
= - 21 - 11
= - 32
d) ( - 5 + 3 ) . [ - 20 - 4 . ( - 5 ) ] - ( - 20 ) ÷ 10 =
= ( - 2 ) . [ - 20 + 20 ] + 20 ÷ 10
= ( - 2 ) . [ 0 ] + 2
= 0 + 2
= + 2