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daca a ORI b =18,iar c ORI a=10, calculeaza : a) a ORI (b+c) :7 ; b)a ORI ( b - c ) : 8 :

Răspuns :

a x b=18
c x a=10
a x(b+c) = (a x b )+( a x c) = 18 x 10= 180
a x (b-c)= (a x b) - (a x c) = 18-10=8

axb=18
bxc=10
a)ax(b+c):7=(axb)+(axc):7=(18+10):7=28:7=4
b)ax(b-c):8=(axb)-(axc):8=18-10=8:8=1

Sper ca te-am ajutat!!!!!!!!