More pieces, the same amount
Explain why splitting every piece changes the name, not the value.
Explore this lesson →11 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Keep the original whole and selected measure fixed.
- Split every original part into the same number of equal children, including unselected parts.
- More parts fit in one whole, while each part becomes smaller. A zero selection stays zero.
Something to notice
Ask what changes in both counts and why the whole does not grow. Have the learner point to the children of a selected and an unselected original piece. A correct number alone does not establish this explanation.
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.NF · 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.