Question

9. Veja como Camilo calcula 34 x 12 34 x 12 34 x (10 + 2) (34 x 10) + (34 X 2) 340 + 68 300 + 40 + 60 + 8 300 + 100 + 8 408
​

Answer 1

Resposta:

a) 840

b) 4.140

c) 840

d) 4.140

Explicação passo-a-passo:

 

24 × 35

24 × (30 + 5)

(24 × 30) + (24 × 5)

720 + 120

700 + 20 + 100 + 20

800 + 40 = 840

b)

45 × 92

45 × (90 + 2)

(45 × 90) + (45 × 2)

4050 + 90

4000 + 50 + 90

4000 + 140 = 4.140

c)

35 × 24

35 × (20 + 4)

(35 × 20) + (35 × 4)

700 + 140

700 + 100 + 40

800 + 40 = 840

d)

92× 45

92 × (40 + 5)

(92 × 40) + (92 × 5)

3680 + 460

3000 + 600 + 80 + 400 + 60

3000 + 1000 + 140 = 4.140