options: Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = �� ÷ 3, 6 × 6 = ?.

Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7.

Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each. For example, describe a context in which a number of shares or a number of groups can be expressed as 56 ÷ 8.
problem_activity: Problem 1
a.   Split 18 counters equally into groups of two.
i. Write a multiplication equation to represent this situation.
ii. How many groups of counters do you have?
b.   How is this similar to Anchor Task #1 from Lesson 3? How is it different?
Problem 2
a.   Casey bought the following stickers. She wants to put 5 stickers in each goodie bag for her birthday party.
[IMG]
i. Write a multiplication equation to represent this problem.
ii. How many goodie bags did Casey fill with stickers?
b.    A grocery store puts 30 watermelons on display. They arrange them in rows of 10.
i. Write a multiplication equation to represent this problem.
ii. How many rows of watermelons are there?
Problem 3
a.   Draw a picture or write a story to represent the following multiplication situation.
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$$\times \ 4 = 12$$
b.   Find the number that makes the equation true. Rewrite the equation with the solution.


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