Răspuns:
Explicație pas cu pas:
1).
a) - 13 + ( - 2 - 3 ) = - 13 + ( - 5 ) = - 13 - 5 = - 18
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b) ( - 4 + 7 ) - ( - 2 - 3 ) + ( - 6 + 1 ) = 3
= 3 - ( - 5 ) + ( - 5 ) =
= 3 + 5 - 5 =
= 3
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2) - 5; - 8; + 7; + 4; - 6; 0; - 10
- 10 < - 8 < - 6 < - 5 < 0 < 4 < 7
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3) a )
( - 6 - 4 ) - ( - 10 + 8 ) + ( - 2 + 9 ) = - 1
= ( - 10 ) - ( - 2 ) + ( + 7) =
= - 10 + 2 + 7 =
= - 8 + 7 =
= - 1
b)
[ - 6 - ( - 9 + 2 ) + ( - 5 + 8 ) ] - [ - 2 + 6 - ( - 6 + 8 ) ] = 2
= [ - 6 - ( - 7 ) + ( + 3 ) ] - [ + 4 - ( + 2 ) ] =
= ( - 6 + 7 + 3 ) - ( 4 - 2 ) =
= ( 1 + 3 ) - 2 =
= 4 - 2 =
= 2