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ELL Math NOTES Name _______________________ Topic: Place Value of Numbers Period _______ Date_________ Questions/Main Ideas Vocabulary: our Our Number System is based on ten. Using only ten symbols (called Digits) we can write any number. The Ten Digits The Digits we use today are called "Hindu-Arabic Numerals" and look like these: only 0 1 2 3 4 5 6 7 8 9 You can use these numbers to count up to 9. based on called count up to Ten Or More ... When we have more than 9 items, we start another column - the "tens" column - and we write down how many "tens" we have, followed by how many ones (called "units"): Tens 1 Units 2 items before the point after the point The Number "12" So we know that we have 1 Ten and 2 Ones, which makes 12. decimal point Write the place value of each number. 23 __________________________ 45 ___________________________ chart 91 __________________________ 72 ___________________________ 19 __________________________ 27 ___________________________ big bigger A Hundred Or More ... When we have more than 99 items, we start another column - the "hundreds" column. Now we need to show how many hundreds, tens and units: Hundreds 1 Tens 4 small smaller The Number 143 great greater large larger Units 3