Understand a Ten as a Bundle of Ten Ones

Students will understand that ten individual ones can be grouped together to form one unit called a 'ten.' Using manipulatives such as linking cubes or ten-frames, students physically bundle ten ones to see how the unit of ten is formed.

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

Grade 1 · Counting and Place Value to 120 · question 1 of 3

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12 rungs. A star at the top.

1 ten = ones

How it is taught

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A ten is a bundle of 10 ones.

1 ten and 10 ones match.

Read it: 10 ones make a ten

You have 27 cubes. Counting them one by one is slow. 2 tens sit bundled, and 7 ones sit loose.

Bundle every 10 ones into a ten.
Count the bundles as tens: 2 tens.
Count the leftover ones: 7. Read 2 tens and 7 ones as 27.

Counting all 27 cubes from one works, but it is slow, and it gets slower as the heap grows.

Bundles stay together, so you count 2 tens instead of 20 loose cubes.

The left digit of 27 counts bundles of 10; the right digit counts cubes still loose.

The tens digit counts those bundles; leftover cubes are the ones.

Counting the 2 ten-cubes as 2 ones, then saying 2 and 7 make 9.

Each of those 2 cubes is already 10. 2 tens is 20, plus 7 ones is 27.

How many tens are in 13? — 1. Bundle 10 ones at a time: 13 is 1 ten and 3 ones left loose.

10 ones = 1 ten

Today we're going to see how the number ten is really built.

Here are ten little cubes. Each cube is just one — we call it a 'one'.

Let's count them: one, two, three, four, five, six, seven, eight, nine, ten.

What if we snap all ten cubes together into one big bundle?

Grade 1 · Bundling ones to make one ten

Watch — they click together into one long stick.

This bundle of ten ones has a special name. We call it 'one ten'.

So ten ones and one ten are the same amount — just packaged differently!

Ten ones make one ten. That's how every ten is built!

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.1.NBT.B.2

Understand that the two digits of a two-digit number represent amounts of tens and ones

CCSS.1.NBT.B.2a

10 can be thought of as a bundle of ten ones — called a 'ten'

Grade 1

Quoted from the Common Core State Standards.

Where this sits

Comes after

Count forward from a given number within 10

Leads to

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 1

This is one rung of 61 in Grade 1 mathematics, in the order they build on each other.

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