Solve multiplication and division word problems.

Watch these Khan Academy videos:

Multiplication and division word problems by Khan Academy

Here's an interesting problem: One piece of lumber was cut into several pieces, each 4 feet long. 5 cuts were made. How long was the lumber before it was cut?

Answer: 4 * (5 + 1) = 24 feet.

Outside these two standards, the phrase *multiplicative comparison* is never seen in mathematics. I find it annoying this phrase is being used at all.

Next, give your students this challenge:

Birthday Cakes by NRICH

Conclude by leading this investigation:

Cartouche Puzzles (arithmetic)

by MathPickle

4.OA.A.1: Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 × 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. Represent verbal statements of multiplicative comparisons as multiplication equations.

4.OA.A.2: Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.