Question

1).a=(5+5:5+2-2:2)×2 , 2).b=16:(25:5-12:3) , 3).c=2-27:(5×5+2:1) . Calculează 2a+38+c

Answer 1

a=(5+5÷5+2-2÷2)×2⇒a=(5+1+2-1)×2⇒a=7×2⇒a=14
b=16÷(25÷5-12÷3)_⇒b=16÷(5-4)⇒b=16÷1⇒b=16
c=2-27÷(5×5+2÷1)⇒c=2-27÷(25+2)⇒c=2-27÷27⇒c=2-1⇒c=1
2a+38+c⇒2×14+38+1=28+38+1=66+1=67
sucees