Sunday, August 30, 2009

Place Value Through the Millions

We spent a lot of time this week working on reading, writing, and understanding numbers up to the hundred millions place.

First we learned The Place Value Song

it is sung to the tune of Row, Row, Row Your Boat

Place Value Periods
Come in Groups of Three
Ones, tens, hundreds
Read them right to left

Thousands, Ten thousands,
Hundred thousands
Place value periods
Read them right to left

Millions, ten millions
hundred millions
Place value periods
Read them right to left.

We also learned 3 forms of a number:

Standard form: 198,876, 612

Word form: one hundred ninety-eight million, eight-hundred seventy six thousand, six hundred twelve

Expanded form: 100,000,000 + 90,000,000,000 + 8,000,000 + 800,000 + 70,000 + 6,000 + 600 + 10 + 2

This week we will be working on rounding numbers and comparing and ordering numbers (putting them in order by size).

We will be using this rounding rhyme

Find your place
Look next store
Five or greater
Add one more
Digits in front
Stay the same
Digits behind
Zero's your name

1 comment:

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