Question

2. Calculeaza, respectand ordinea operaților a) (48-35)×3+63÷9-8÷2
b) 5×5×3+5-5×3+5+3×5+5
c) (64÷4÷4+81÷3÷3+72÷2÷2+4÷1÷1)÷5
​

Answer 1

Răspuns:

a) 42

b) 90

c) 7

Explicație pas cu pas:

( 48 - 35 ) × 3 + 63 : 9 - 8 : 2 =

= 13 × 3 + 7 - 4 =

= 39 + 7 - 4 =

= 46 - 4 =

= 42

_______________

5 × 5 × 3 + 5 - 5 × 3 + 5 + 3 × 5 + 5 =

= 25 × 3 + 5 - 15 + 5 + 15 + 5 =

= 75 + 5 - 15 + 5 + 15 + 5 =

= 80 - 15 + 5 + 15 + 5 =

= 65 + 5 + 15 + 5 =

= 70 + 15 + 5 =

= 85 + 5 =

= 90

_______________

( 64 : 4 : 4 + 81 : 3 : 3 + 72 : 2 : 2 + 4 : 1 : 1 ) : 5 =

= ( 16 : 4 + 27 : 3 + 36 : 2 + 4 : 1 ) : 5 =

= ( 4 + 9 + 18 + 4 ) : 5 =

= ( 13 + 18 + 4 ) : 5 =

= ( 31 + 4 ) : 5 =

= 35 : 5 =

= 7

Succes!