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a fost răspuns

7×3+2×9-30):3=
8×2-2×6×10=
(24:4-3)×9+27=
30-20:4:5=
(36:6+24:7)-4×2=
va rog sa imi aratati fiecare pas

Răspuns :

(7 × 3 + 2 × 9 - 30) : 3 = 

= (21 + 18 - 30) : 3

= (39 - 30) : 3

= 9 : 3

= 3
-------------------------

8 × 2 - 2 × 6 × 10 =

= 16 - 120

= - 104
-------------------------

(24 : 4 - 3) × 9 + 27 =

= (6 - 3) x 9 + 27

= 3 x 9 + 27

= 27 + 27

= 54
------------------------

30 - 20 : 4 : 5 =

= 30 - 5 : 5

= 30 - 1

= 29
---------------------

(36 : 6 + 24 : 6) - 4 × 2 =

= (6 + 4) - 8

= 10 - 8

= 2
Marcela16
(7 × 3 + 2 × 9 - 30 ) : 3 =
( 21 + 18 - 30 ) : 3 =
( 39 - 30 ) : 3 =
9 : 3 = 3


8 × 2 - 2 × 6 × 10 =
16 - 12 × 10 =
16 - 120 = - 104


( 24 : 4 - 3 ) × 9 + 27 =
( 6 - 3 ) × 9 + 27 =
3 × 9 + 27 =
27 + 27 = 54


30 - 20 : 4 : 5 =
30 - 5 : 5 =
30 - 1 = 29


( 36 : 6 + 21 : 7 ) - 4 × 2 =
( 6 + 3 ) - 4 × 2 =
9 - 8 = 1

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