Whole Numbers Times Fractions

Solve 20 × 3/4 with models and equations.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 69

Each cupcake takes 3 fourths of a cup of frosting. How much for 20 cupcakes? That's 20 groups of 3 fourths.
Multiply the whole number by the top. 20 times 3 is 60, so that's 60 fourths. The size of the piece stays fourths.
A fraction is division, so 60 fourths is 60 divided by 4. That's 15 cups.
You can also think of it another way. 1 fourth of 20 is 5, and 3 of those is 15. Choose what makes sense to you.

Georgia's K-12 Mathematics Standards:

5.NR.3.4 — Model and solve problems involving multiplication of a fraction and a whole number.