Lesson 1 5th Math

Place Value and Patterns.

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Our place value system is based on a pattern of tens. Each place value increases ten times the value of the place to its right.

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We use the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 to write any whole number.

The symbols are called digits. Digits have different values depending on their position in the number.

Numbers are arranged into groups of three called periods. The places within a period repeat (hundreds, tens, ones etc.) Starting at the left, we read the three numbers in a period and then stop at the end of each period and read the unit name before continuing on. The units period does not have to be named when reading a number. We usually separate the periods with commas.

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