Find the first place that differs
Use whole counts, tenths and hundredths to justify a comparison.
Explore this lesson →9 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Compare complete whole counts before fractional places.
- The first differing place determines order; later places cannot overturn it.
- If all normalized places agree, the amounts are equal.
Something to notice
Ask the learner to justify a fresh comparison using equal units or the first different place. For unknown ribbon wholes, ask what information is missing and why a larger share need not be a longer piece. Child, educator, physical, oral and retained-learning evidence remains pending.
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.