bonjour
je te montre
a. ( + 4 ) - ( - 2 ) + ( - 8 ) - ( + 7 )
= ( + 4 ) + ( + 2) + ( - 8 ) + ( - 7)
= 4 + 2 - 8 - 7
= 6 - 15
= - 7
b. ( - 27) - ( - 35 ) - ( - 20) + ( + 17 )
= ( - 27) + ( + 35 ) + ( + 20 ) + ( - 17 )
= - 27 + 35 +20 - 17
= - 44 + 55
= 19
continue
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bonjour
je te montre
a. ( + 4 ) - ( - 2 ) + ( - 8 ) - ( + 7 )
= ( + 4 ) + ( + 2) + ( - 8 ) + ( - 7)
= 4 + 2 - 8 - 7
= 6 - 15
= - 7
b. ( - 27) - ( - 35 ) - ( - 20) + ( + 17 )
= ( - 27) + ( + 35 ) + ( + 20 ) + ( - 17 )
= - 27 + 35 +20 - 17
= - 44 + 55
= 19
continue