Same count, compare the parts
Compare equal counts of different unit parts, including the zero exception.
Explore this lesson →12 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- When the whole is the same, fractions with the same denominator use equal-sized parts. Compare how many of those parts each amount has.
- With the same positive numerator, compare the part sizes. Dividing the same whole into more equal parts makes each part smaller. Zero copies of any unit still makes zero.
- Use <, = or > and explain the size relationship. Different physical whole sizes can change the areas represented by the fractional names.
Something to notice
Ask the learner to justify an unfamiliar comparison using a common whole, and distinguish fractional numbers from areas taken from different-sized wholes. The API requires both a comparison symbol and an authored correct reasoning choice for structured questions. It does not judge spontaneous speech or proof. Unequal numerators and denominators beyond simple equivalence are later-grade work.
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 3 · 3.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.