Reading and Writing Numbers up to
In this video, we will learn how to
model, read, and write numbers to 100 in digits and words. We can write numbers using digits
or words. The two-digit numbers up to 100
have an amount of tens and ones. We can model these numbers using
maths equipment, like ten frames or place value blocks.
What number is shown in this
model? This is a ten frame. And it’s full; it has 10
counters. We can write this in our place
value chart. Our number has one ten. We call these counters the
ones. This is because the ten frame is
not yet full; it has less than 10 counters.
How many ones are there? Did you count? There are eight ones. One ten and eight ones is 18. How would we write this number in
words? 18 is a teen number. These are the numbers between 10
and 20. Let’s practice writing the teen
numbers in words. Eleven, twelve, thirteen, fourteen,
fifteen, sixteen, seventeen, eighteen, nineteen. This is how we write 18 in digits,
and this is how we write 18 in words.
When we write numbers between 20
and 100 in words, we need to use a tens word and a ones word. The tens digit in the number 65 is
worth 60. Six tens are 60. So, our tens word is 60. And the five digit in 65 is worth
five ones. So, our ones word is five. We wrote the number 65 in digits
How would we write the number forty-nine
using digits? We write 40 as four tens and the
nine as nine ones. This is how you write the number 49
in digits. The four tens are worth 40, and the
nines digit is worth nine ones. We wrote the number 49 in digits
and words. Let’s practice modeling, reading,
and writing numbers to 100 in digits and words.
Noah and Emma tried to read the
number given. Emma said it is 74, and Noah said
it is 47. Who said the right answer?
Noah and Emma are trying to work
out which number is shown in the model. We know it’s a two-digit number
because it has an amount of tens and ones. Emma thinks the number is 74, and
Noah thinks the number is 47. Let’s count the tens and ones to
find out who’s right.
How many tens are there in the tens
part of this number? One, two, three, four, five, six,
seven. So, we can write a seven in the
tens place. Did you count the ones? There are four. Seven tens and four ones is 74. So, Emma was right. It looks like Noah wrote the tens
and ones digits the wrong way round. The number given is 74. So, Emma was right.
Write the given number in
We’re shown a two-digit number. And we have to write it in
words. How many tens does this number
have? One, two, three, four, five,
six. We have six tens. Now, let’s count the ones. One, two, three, four, five, six,
seven. Six tens and seven ones. We’ve written the number in
digits. The number is 67. Six tens are 60. 10, 20, 30, 40, 50, 60. And this is how we write 60 in
words. This is the tens part of the
And we know that the ones part of
the number is worth seven. This is how we write seven in
words. The given number is 67. And this is how we write it in
Daniel writes fifty-seven in
words. Write that number in digits.
Daniel has written the number
fifty-seven using words. Now, we have to write the same
number using digits. The tens part of Daniel’s number is
fifty. We can model fifty using five
tens. 10, 20, 30, 40, 50. Daniel’s number has five tens,
worth 50, and seven ones. We wrote the number 57 using
digits. Five tens and seven ones is 57.
Write the number 85 in words.
We can model the number 85 using
eight tens. Eight tens are 80. 10, 20, 30, 40, 50, 60, 70, 80. 85 has eight tens and five
ones. We know the tens part of the number
85 is worth 80. And this is how we write five in
words. The tens part of the number is 80,
and the ones part is five, 85. We wrote the number 85 in
What have we learned in this
video? We learned how to model, read, and
write numbers up to 100 in digits and words.