Identify Numbers 100–900 as Multiples of a Hundred

Students will recognize and name numbers such as 100, 200, 300 … 900 as representing a specific number of hundreds with zero tens and zero ones. They will match numerals to the number of hundred-blocks represented.

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Real questions from this skill, graded here. No account, and nothing is saved.

Grade 2 · Understanding Place Value to 1000 · question 1 of 3

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12 rungs. A star at the top.

At the parade, Dev shows a sign with 2 hundreds and nothing else. What number is on the sign?

How it is taught

0:00 of 2:35

A multiple of 100 ends in two zeros.

Those zeros hold tens and ones.

Read it: Hundreds, tens and ones

640 in a chart: 6 chips of 100, 4 chips of 10 and 0 chips of 1. So 640 is 6 hundreds, 4 tens and 0 ones.

Put each place in its own column: hundreds, tens, ones.
Count the chips in each column: 6, 4 and 0.
Write the digits in that order: 640.

A chip of 100 is worth 10 chips of 10, and a chip of 10 is worth 10 chips of 1.

Each digit tells how many chips are in its place.

A 0 holds an empty place: 640 has no ones, and 305 has no tens.

Each digit tells how many hundreds, tens or ones. 10 of a place make 1 of the next.

Reading 640 as 64, because the ones place is empty.

The 0 holds the ones place: 6 hundreds, 4 tens and 0 ones is 640.

4 hundreds = ___ — 400. 4 hundreds, 0 tens and 0 ones: 400.

300 = 3 hundreds

Today we'll learn about multiples of a hundred. Let's build the number three hundred together.

Here is one block of a hundred — that's one hundred ones grouped together.

Add another hundred. Now we have two hundred.

One more hundred makes three hundred!

Let's count them: one hundred, two hundred, three hundred. That's three hundreds in all.

We can write three hundred using a place value chart with hundreds, tens, and ones.

We have three hundreds, so we write three in the hundreds place.

There are no extra tens left over, so we write zero in the tens place.

And no extra ones, so we write zero in the ones place.

Three, zero, zero. We read this number as three hundred.

Three hundred is a multiple of a hundred — just three groups of one hundred!

Grade 2 · Building numbers like 100, 200, 300

What you see

While they climb, your page writes one true line to ask about tonight, and a short note each Sunday.

MayaGrade 3 · Mathematics

Did you know?

A chessboard has 64 squares — share them out between the 8 rows and each row holds exactly 8.

Today’s goal: 1 star — one skill mastered, every rung of its ladder climbed
Climbing now: Divide within 100

An example student.

MayaGrade 3 · Mathematics

Maya earned 2 stars this week — Interpret multiplication as equal groups, which took 6 answers over 3 days before its star landed 3 days ago and Multiply by 6, 7, 8 and 9. Next up: Divide within 100.

An example week.

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Standards

CCSS.2.NBT.A.1

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones

CCSS.2.NBT.A.1b

The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones)

Grade 2

Quoted from the Common Core State Standards.

Where this sits

Comes after

Understand Three-Digit Numbers as Hundreds, Tens, and Ones

Leads toNothing yet

What a star here means

A star here is the top of a twelve-rung ladder, in four blocks of equal length — three of facts and one of the skill used in a real question — where a right answer climbs one rung and a wrong one drops back to the start of the block, never below it. The star is kept for good. How we grade

All of Grade 2

This is one rung of 85 in Grade 2 mathematics, in the order they build on each other.

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