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Unit: 2.3

Multiples of a Hundred

In this unit students

•  understand hundreds, tens, and ones and skip count by 5s, 10s, and 100s;
•  read and write numbers to 1000 and compare three digit numbers using symbols;
•  develop and use addition and subtraction using strategies based on place value;
•  mentally add and subtract 10 or 100 to multiples of 10 or 100;
•  understand dollars as 100 pennies and 10 dimes.

This unit focuses on place value. Building on foundations laid in Kindergarten and first grade, students extend their understanding of numbers into the hundreds. Developing conceptual understanding of place value is critical for success with addition and subtraction of larger numbers. Students understand that 10 tens are bundled to be 100. Counting extends to 1000, including skip counting by 5s, 10s, and 100s.

Students use the symbols <, >, and = to compare three-digit numbers based on the value of the hundreds, tens, and ones. They understand dollars as 100 pennies and 10 dimes and use money to support their growing understanding of place value.

Students work with mentally adding and subtracting 10 or 100 to decades and centuries.

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