DO NOW

• For 902,798 write the digit in the hundreds place• 6 X 2• Can 351 be divided evenly by 2• 80 / 8• What is the time 3 hours after 9 pm

Place Value to the billions, whole numbers, standard notation and base systems

August 28, 2013

What is place value?

• Place value chart- shows the value of the digits in a number

• Period- in greater numbers each group of three is divided with a comma is called a period

• Place value- name and value of a number in a certain position

• Standard form- is the way a number is commonly written

Place value to the billions

Pattern?

• When the number goes from ones to tens it is multiplied by 10

• When the tens are multiplied by 10 it becomes 100.• When the hundreds are multiplied by ten it becomes

1000.

Practice

• In your groups using the unit cubes, display these numbers and draw them as well as you can in your journals. – 1,532– 25– 862– 712

What is a base system?

• We use the base system of 10. • This means that in the number 456

– There are 6 ones (1 X 6)– The value in the tens is 50 (5x10)– The value in the hundreds is 400 (4*100)

• Each number gets multiplied by 10 to find its value in a number.

Base systems

• Why do we use them? • Does it make our lives easier? Yes? No?• Could you figure out a different base system?

What is or isn’t a number

• 123,456,789 – yes• 012,345,678- No, numbers can not start with a zero in

the front

Break these numbers into periods

• 751,156,456• 1,458,753,159• 125,456• 852,741,963

Write these numbers in standard notation

• Five hundred sixty two• Two thousand three hundred seventy one• Five hundred seventy two thousand one hundred

ninety five

What is in the _____ place?

• 156• 845,156,123• 95,874,563,145• 25• 863,456,120

Homework

• Place value practice: phoney baloney, September star stinkers