Question

calcule as expressões

a)2/3×(15/5÷15/2)

b)[2/4×(3÷2/5)×1/5]

Answer 1

Olá...

a)

2/3 × (15/5 ÷ 15/2)

2/3 × (15/5 × 2/15

2/3 × (1/5 ×2)

2/3 × 2/5

4/15

b)

[2/4 × (3 ÷ 2/5) × 1/5]

[2/4 × (3 × 5/2) × 1/5

[2/x × 15/2 × 1/5]

[1/4 × 15 × 1/5]

[1/4 × 3]

3/4

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