Question

calculează:
a) (18 + 2 7): (12: 2 +8:4)
b) 24 - 24:3 (72:9- 2 x 3): 45
c) 36: 6+4 * 2 * 5 - (20 - 12:3)
d) 42:7 + (6 + 6): 2-24 : (5 + 3)
e) (25 + 20): 5 - (19 + 5): 8
f) 10+(10:10 + 10) - (10 x 1 + 10)​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

( 18 + 2 × 7 ) : ( 12 : 2 + 8 : 4 ) = 4

= ( 18 + 14 ) : ( 6 + 2 ) =

= 32 : 8 =

= 4

_____________________

b)

24 - 24 : 3 × ( 72 : 9 - 2 × 3 ) : 4 × 5 = 4

= 24 - 8 × ( 8 - 6 ) : 4 × 5 =

= 24  - 8 × 2 : 4 × 5 =

= 24 - 16 : 4 × 5 =

= 24 - 4 × 5 =

= 24 - 20 =

= 4

__________________________

c)

36 : 6 + 4 × 2 × 5 - ( 20 - 12 : 3 ) = 30

= 6 + 8 × 5 - ( 20 - 4 ) =

= 6 + 40 - 16 =

= 46 - 16 =

= 30

_____________________________

d)

42 : 7 + ( 6+6) : 2 - 24 : ( 5 + 3 ) = 9

= 6 + 12 : 2 - 24 : 8 =

= 6 + 6 - 3 =

= 12 - 3 =

= 9

_____________________________

e)

( 25 + 20 ) : 5 - ( 19 + 5 ) : 8 = 12

= 45 : 5 + 24 : 8 =

= 9 + 3 =

= 12

___________________________

f)

10 + ( 10 : 10 + 10 ) - ( 10 × 1 + 10 ) = 1

= 10 + ( 1 + 10 ) - ( 10 + 10 ) =

= 10 + 11 - 20 =

= 21 - 20 =

= 1