Răspuns :

MihaiN16id

Explicație pas cu pas:

(111.111 + 222.222 + 333.333 + 444.444) - 555.555 × 2 =

= 111.111 × ( 1 + 2 + 3 + 4) - 555.555 × 2 =

= 111.111 × 10 - 111.111 × 5 × 2 =

= 111.111 × 10 - 111.111 × 10 =

= 10 × (111.111 - 111.111) =

= 10 × 0 =

= 0

9 : 9 × 9 + 9 × 9 - 9 =

= 1 × 9 + 81 - 9 =

= 9 + 81 - 9 =

= 81

-Mihai

Răspuns:

Explicație pas cu pas:

(111.111 + 222.222 + 333.333 + 444.444) - 555.555 × 2 =

111.111 × ( 1 + 2 + 3 + 4) - 555.555 × 2 =

111.111 × 5 - 555.555 × 2 =

111.111 × (10 - 5 × 2) =

111.111 × (10 - 10) =

111.111 × 0 = 0

__________________

9 : 9 × 9 + 9 × 9 - 9 =

1 × 9 + 9 × 9 - 9 =

9 + 9 × 9 - 9 =

9 + 81 - 9 = 81

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