СРОЧНО РЕШИТЕ 1 И 3 20...

Question

СРОЧНО РЕШИТЕ 1 И 3
20 БАЛЛОВ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
НОМЕР 691

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Answer 1

1) 3^2 × 3 × 1/9 + 1 -4 +2/3 = 3 -3 +2/3 = 2/3
3) (- 2 ^-18 × 2^2 × 2 ^20 + 2^-12 × 2^ 14)÷ 2^7 = (-2 ^4 + 2^2)÷ 2 = (4 - 16 ):2 = - 3