Răspuns:
Explicație pas cu pas:
a)
1 × ( 4 + 5 - 6 ) = 3
= 1 × ( 9 - 6 ) =
= 1 × 3 =
= 3
________________
b)
( 2 + 3 ) × 4 : ( 5 + 6 - 7 ) = 5
= 5 × 4 : ( 11 - 7 ) =
= 20 : 4 =
= 5
______________________
c)
3 + ( 4 + 5 - 6 + 7 - 8 ) = 5
= 3 + ( 9 - 6 + 7 - 8 ) =
= 3 + ( 3 + 7 - 8 ) =
= 3 + ( 10 - 8 ) =
= 3 + 2 =
= 5
______________
d)
4 : [ 5 - 6 : ( 7 + 8 - 9 ) ] = 1
= 4 : [ 5 - 6 : ( 15 - 9 ) ] =
= 4 : ( 5 - 6 : 6 ) =
= 4 : ( 5 - 1 ) =
= 4 : 4 =
= 1