Which number makes it true?
Find missing values in multiplication and division equations, wherever the blank appears.
Explore this lesson →12 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Division can be read as a missing-factor question: which factor makes the known product?
- An equals sign compares values. The missing number can be a factor, product, dividend, divisor or quotient, on either side.
- Try a whole number in every matching blank. Calculate carefully and check that both sides agree. Never divide by zero.
Something to notice
Ask students to explain why a related multiplication determines a division result, invent matching situations, and justify their substitutions without following an example. These items have unique whole-number solutions; identities with many solutions are excluded. A supplied equation does not establish independent modeling of a word problem. Properties, mixed contexts, fluent strategies and recall require further lessons; checked answers do not establish mastery or educator/learner review.
Try it. Change it. Explain it.
Open the lesson to use its pictures and controls. In How it works, connect the picture to the idea. In Play & discover, change the quantities and notice what stays the same. In Your turn, answer questions and use the explanation to check your reasoning.
You can ask for help, draw on the thinking pad, or listen to the question and answer options. Progress distinguishes independent work from work completed with help.
Let’s try it →Curriculum connection
Grade 3 · 3.OA · US Common Core
This lesson is mapped to these standards. A completed activity is practice evidence, not a claim of mastery. Content is checked against the linked official standards and its mathematical models are tested.