Hundreds with empty places
Connect every whole hundred from 100 to 900 with its hundreds and zero extra tens and ones.
Explore this lesson →15 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- 100 means one hundred, 200 means two hundreds, and so on through nine hundreds, 900.
- In these numerals, the hundreds contain the whole amount. The zeros record no extra tens or ones beside them.
- Each hundred still contains ten tens or one hundred ones. Renaming its groups does not change the amount.
Something to notice
Ask learners to bundle physical tens, explain zero in a numeral, read and write fresh number names, and continue a count from an unfamiliar start. Screen models and typed answers support these ideas but do not establish handwriting skill or independent 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 2 · 2.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.