Split a large number into useful parts
Multiply up to four digits by one digit with place-value parts.
Explore this lesson →10 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Split the larger original factor into its place values.
- Multiply every part by the one-digit factor, including an explicitly recorded zero part.
- Add all partial products once to reconstruct the whole product.
- An original zero digit can still have a nonzero place in the final product after quantities combine.
Something to notice
Ask the learner to connect each partial product to its original place unit. Use both three- and four-digit inputs with internal zeros. Invite an explanation of how the partials combine; a correct final total alone is weaker evidence than the region record.
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 4 · 4.NBT · 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.