New products, connected ideas
Apply unit reasoning, partitions and complete regions to different products.
Explore this lesson →18 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Read whether you are finding unit counts, regions, a chosen split, a repaired record or an exact total.
- The same place-unit and distributive relationships apply when the factors change.
- Preserve the original quantities and include every pair of parts.
- Explain a selected region, check the total and revisit another example later.
Something to notice
Watch how the learner handles unfamiliar zero positions and different partitions. Compare a supplied partition with one the child chooses. Completion samples transfer across these families; it does not by itself establish retention or explanation quality.
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.