Split each ribbon into two parts
Multiply whole and remaining lengths, then join their products.
Explore this lesson →9 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- A whole-meter part and a remaining part must keep the original ribbon length.
- The remaining part can be longer than one meter; more than one exact split may work.
- Use the same ribbon count for both parts, then add their total lengths.
Something to notice
Ask the learner to point to one meter and explain what stays the same when pieces are renamed or a ribbon is split. Invite a different valid route without demonstrating the answer. Oral, child and educator evidence remains to be collected.
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.