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Respuestas : 3.

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Manoelamaral430
8

Respuestas :

3.

A) 8 - (3 + 4) = 8 - (7) = 1

b) (12 - 6 + 4) × 2 = (10) × 2 = 20

c) (50 + 80 - 30) ÷ 5 = (100) ÷ 5 = 20

d) [(12 - 8) ÷ (7 - 5)] = [(4) ÷ (2)] = [2] = 2

e) {[10 × (3 + 6) ÷ 3 × (9 - 4)] ÷ 2} × 20 = {[10 × (9) ÷ 3 (5)] ÷ 2} × 20 = {[90 ÷ 15] ÷ 2} × 20 = {[6] ÷ 2} × 20 = {3} × 20 = 60

4.

A) FALSO

b) VERDADERO

c) FALSO.