Effectuer les opérations en simplifiant les calculs:
E =(4-5+2)-(-1+7-8)
= ( 4 - 3 ) - ( - 9 +7)
= 1 - ( - 2 )
= 1 + 2 = 3
F=-(-2+8-1)-(7+6−8)−(−3+1)
= - ( 8 - 3 ) - ( 13 - 8) - ( - 2 )
= - ( 5) - ( 5) - ( - 2)
= - 5 + 5 + 2
= 2
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Effectuer les opérations en simplifiant les calculs:
E =(4-5+2)-(-1+7-8)
= ( 4 - 3 ) - ( - 9 +7)
= 1 - ( - 2 )
= 1 + 2 = 3
F=-(-2+8-1)-(7+6−8)−(−3+1)
= - ( 8 - 3 ) - ( 13 - 8) - ( - 2 )
= - ( 5) - ( 5) - ( - 2)
= - 5 + 5 + 2
= 2