Topics
6. Multiplication and division
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United States of AmericaTennessee
Grade 3

6.05 Finding unknowns

Lesson
Practice
Lesson

Are you ready?

Remembering your multiplication tables will help you solve problems in this lesson. Let's give this problem a try. 

$5\times9$5×9

Learn

This video shows us how to find unknowns using our multiplication and division facts.

Apply

Fill in the box with the missing number.

  1. $9\times\editable{}=63$9×=63

 

Remember!

For multiplication the order doesn't matter, so if we have $4\times5$4×5, we can also write it as $5\times4$5×4 and get the same answer.  

Outcomes

3.OA.A.4

Determine the unknown whole number in a multiplication or division equation relating three whole numbers within 100. For example, determine the unknown number that makes the equation true in each of the equations: 8 x ? = 48, 5 = ? ÷ 3, 6 x 6 =?.

3.OA.B.6

6 Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8.

3.OA.C.7

Fluently multiply and divide within 100, using strategies such as the properties of operations or the relationship between multiplication and division (e.g., knowing that 8 x 5 = 40, one knows 40 ÷ 5 = 8). By the end of 3rd grade, know all products of two one-digit numbers and related division facts.

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