Calcule o valor das expressões numéricas: a) 20 – (16 ÷ 4 + 10) b) 100 ÷ 25 + 2 x 2 – 8 c) {[13 - (3 x 2 + 1)] + 3 + (5 x 2 – 4 ÷ 2)} x 3 d) 30 – 4...

a) 20 - (16 ÷ 4 + 10) = 20 - (4 + 10) = 20 - 14 = 6 b) 100 ÷ 25 + 2 x 2 - 8 = 4 + 4 - 8 = 0 c) {[13 - (3 x 2 + 1)] + 3 + (5 x 2 – 4 ÷ 2)} x 3 = {[13 - (6 + 1)] + 3 + (5 x 2 – 2)} x 3 = {[13 - 7] + 3 + (10 – 2)} x 3 = {6 + 3 + 8} x 3 = 51 d) 30 – 40 ÷ (8 – 3) ÷ 2 = 30 - 8 ÷ 2 = 30 - 4 = 26 e) 100 – 413 x (20 – 5 x 4) + 1 = 100 - 413 x (20 - 20) + 1 = 100 - 1 = 99 f) 400 – {10 – [30 ÷ (30 – 0 ÷ 17)] – 1} = 400 - {10 - [30 ÷ (30 - 0 ÷ 17)] - 1} = 400 - {10 - [30 ÷ 30] - 1} = 400 - {10 - 1 - 1} = 390 g) 27 + {14 + 3 x [100 ÷ (18 – 4 x 2) + 7]} ÷ 13 = 27 + {14 + 3 x [100 ÷ (18 - 8) + 7]} ÷ 13 = 27 + {14 + 3 x [100 ÷ 10 + 7]} ÷ 13 = 27 + {14 + 3 x [10 + 7]} ÷ 13 = 27 + {14 + 51} ÷ 13 = 27 + 5 = 32 h) 10 + {[350 ÷ (23 x 2 + 24)] – 2 x (1 + 35 ÷ 35)} x 17 = 10 + {[350 ÷ (46 + 24)] - 2 x (1 + 1)} x 17 = 10 + {[350 ÷ 70] - 2 x 2} x 17 = 10 + {5 - 4} x 17 = 10 + 17 = 27