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Verificati rezultatele exercitiilor,efectuand calculele.
a) 100 : (4 x 5 ) + 75 x (2 + 7) = 680

b)4 x 7 x 25 - 100 x 2 : 2 = 600

c) 4 x 75 + 8 : ( 3 + 1 ) x 2 = 604

d) [(21 + 42 ) x 3 ] x [4 x ( 18 + 12 )] = 150

VA ROG!


Răspuns :

a) 100 : (4 x 5 ) + 75 x (2 + 7) = 680
100:20+75x9=680
5+675=680(A)

b)4 x 7 x 25 - 100 x 2 : 2 = 600
700-100=600(A)

c) 4 x 75 + 8 : ( 3 + 1 ) x 2 = 604 
300+1=301
Rezultatul,este,fals.

d) [(21 + 42 ) x 3 ] x [4 x ( 18 + 12 )] = 150
(63x3)x(4x30)=150
189x120=22680
Rezultatul,este,fals.