4.NF.B.4

Build fractions from unit fractions. a. Understand a fraction 𝑎𝑎 𝑏𝑏 as a multiple of a unit fraction 1 𝑏𝑏 . In general, 𝑎𝑎 𝑏𝑏 = a x 1 𝑏𝑏 . b. Understand a multiple of 𝑎𝑎 𝑏𝑏 as a multiple of a unit fraction 1 𝑏𝑏 , and use this understanding to multiply a whole number by a fraction. In general, n x 𝑎𝑎 𝑏𝑏 = 𝑛𝑛 𝑥𝑥 𝑎𝑎 𝑏𝑏 . c. Solve word problems involving multiplication of a whole number by a fraction. For example, if each person at a party will eat 3/8 of a pound of roast beef, and there will be 5 people at the party, how many pounds of roast beef will be needed? Between what two whole numbers does your answer lie?