Numbers through 100,000,000

Math Unit Two Lesson Two

Objective: What will I learn today?

• Use the standard form and word form of a number up to 100,000,000.

• Read a number aloud up to 100,000,000.

What is standard form?

Standard form is the regular way you would write a number.

345,678 1,578,263

12,345,600

Write a number in Standard Form

Word Form

• When we write a number in word form, we write out the words for that number

Seventy-two thousand, three hundred eighty-six

Ten million, three hundred twenty-one thousand, five hundred seventeen

Eighty-five

Write a number in word form

Standard Form Word Form

How do we read a number?

6 1 3 5 2 8 2

How do we read a number?

How do we read a number?

How do we write the word form of a number?

Step one-read the number either out loud or in your head.

Step two- write the words that match what your are saying

How do we use word form?

6 1 3 5 2 8 2

How do we use word form?

2 8 0 7 5 3 0 6 1

Word form to standard form

Six million, two hundred seventy-five thousand, one hundred three

Word form to standard form

Thirty-four million, five hundred sixty thousand, eight hundred twenty-two

Nine million, six hundred fifty-six thousand, three hundred sixteen

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

17 18 19 20

Check-Up!

Choose the word form of the number. 6,601,490

A. six million, six hundred ten thousand, one hundred forty-three

B. six million, six hundred thousand, one hundred ninetyC. six million, six hundred one thousand, four hundred

ninetyD. sixty million, six hundred one thousand, four hundred

ninety

Check-Up!

Choose the word form of the number.

45,600,000

A. forty-five million, sixty thousandC. forty-five million, sixtyB. forty-five million, six hundred thousandD. forty-five million, six thousand

Check-Up!

There were twenty-seven million, four hundred forty thousand, three hundred twenty-one aliens on planet Zodar. What is the standard form of this number?

A. 27,440B. 27,443,021C. 2,700,432D. 27,440,321

Check-Up!

Sixty-six million, nine hundred thirty-one thousand, seventy doughnuts were sold at Dunkin Donuts last year. What is the standard form of this number?

A. 66,931B. 66,931,070C. 6,931,070D. 66,931,700