Compare decimal amounts
Compare same-unit amounts through thousandths and explain the first differing place.
Explore this lesson →10 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Start both lengths at the same zero and keep one metre as the reference whole.
- Line up decimal points. A zero at the end of a decimal does not change the amount.
- Compare digits from the greatest place downward. The first difference decides the comparison; equal amounts have no differing place.
Something to notice
Ask the learner to compare two new same-unit lengths, explain which place first settles the comparison, and explain why a trailing zero leaves a length unchanged. Record actual reasoning and assistance; narration playback is not spoken evidence.
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 5 · 5.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.