Unknown in Multiplication

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Examples, videos, and solutions to help Grade 3 students learn how to interpret the unknown in multiplication and division to model and solve problems.

Common Core Standards: 3.OA.3, 3.OA.4, 3.OA.5, 3.OA.7, 3.OA.1, 3.OA.2, 3.OA.6, 3.OA.8

New York State Common Core Math Grade 3, Module 3, Lesson 7

Concept Development

Thad sees 7 beetles when he weeds his garden. Each beetle has 6 legs. How many legs are there on all 7 beetles?

Lesson 7 Homework
1. Match the words on the arrow to the correct equation on the target.

2. Ari sells 6 boxes of pens at the school store.
a. Each box of pens sells for \$7. Draw a tape diagram and label the total amount of money he makes as m. Write an equation and solve for m.
b. Each box contains 6 pens. Draw a tape diagram and label the total number of pens as p. Write an equation and solve for p.

3. Mr. Lucas divides 28 students into 7 equal groups for a project. Draw a tape diagram and label the number of students in each group as n. Write an equation and solve for n.

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