How do you write a number in words?

The grasshopper hopped 49 times.

But wait! I want to write

that number in a story.

In this lesson you will learn how to read numbers

by writing numbers as words.

Let’s Review

15 standard form

Numbers can be written in standard form, expanded form, and word form.

10 + 5

1 ten and 5 ones expanded form

fifteen word form

Let’s Review

When you read a number you read from left to right – just like reading words.

52

fifty-two

15

fifteen(5 + 10)

79

seventy-nine

Core Lesson

Two types of numbers are tricky to write.

13, 14, 15…fifteen

teen stands for 10so 15 = 5 + 10

Teens Tens

20, 30, 40,50…twenty

ty stands for 10’sso 20 = 2 tens

Core Lesson

A model can help us decide how to write a number as words.

725

seven hundred twenty-five

700

20 5

Core Lesson

518

five hundred

50010 8

We write the words for each

part of the number.

+ = 18

eighteen

A Common Misunderstanding

Thinking that 705 is written as seven hundred zero five.

705

We write seven hundred five700

5

Core Lesson

So how do I write 49 hops

as words?

The grasshopper hopped forty-nine times.

40 9

In this lesson you have learned how to read numbers

by writing numbers as words