Counting to 100 with Models

Learning to recognize numbers using tens and ones Grade 1 Mathematics

What Are Tens and Ones?

Ones are single units Tens are groups of 10 ones We can count faster with tens!

Let's Count Together!

Count these dots How many do you see? Can you group them by tens?

Base Ten Blocks

Small cubes = ones Long rods = tens Each rod equals 10 cubes

How Many Do You See?

Look at the blocks Count the tens first Then count the ones What number is it?

Reading Numbers with Models

First count the tens Then count the ones Put them together!

Practice Time!

What number is shown? Remember: tens first, ones second

Tens and Ones Chart

{"left":"2 tens, 3 ones = 23\n4 tens, 1 one = 41","right":"6 tens, 8 ones = 68\n9 tens, 0 ones = 90"}

Challenge Question

I have 8 tens and 5 ones What number am I? Draw it or use blocks!

Special Numbers

Some numbers have zero ones Some numbers have zero tens 100 is special - it's 10 tens!

Build the Number

Teacher says a number Students build it with blocks Show your work!

Counting to 100 Chart