4.NF.A.1 Explain why a fraction 𝑎 is equivalent to a fraction 𝑎 x 𝑛 or 𝑎 ÷ 𝑛 by using 𝑏 𝑏x𝑛 𝑏÷𝑛
visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to
recognize and generate equivalent fractions. For example, 3 = 3 x 2 = 6 .