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22. a) (+54 + 21)+(-19 + 21) – (54 + 17) + 2;
“6) -9 + 13 – (-9 + 13 – 10)] -(-7 + 17);


Răspuns :

Socsos

Răspuns:

a) 75+(+2)-( 71)+2=75+2-71+2=77-69=8

b) -9+13-(4-10)-(10)=4-(-6)-10=4+6-10=10-10=0

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