GTK: Second Grade
Part of using base-ten numbers correctly is understanding how to express the same number in different forms. This video demonstrates how to express base-ten numerals written in standard form, unit form, expanded form, and number name.
Your students continue to use tape diagrams as a visual tool to solve word problems. Now, they solve for an unknown in any position.
This video demonstrates Common Core Grade 2 Standard Operations & Algebraic Thinking: Represent and solve problems involving addition and subtraction.
Becoming comfortable with two-digit and three-digit numbers is an important skill in second grade. Your child will master addition and subtraction problems within one-thousand. But, how your child learns to understand addition and subtraction is very important.
If you look closely, a place value chart is a helpful tool to use before your child uses the standard algorithm. The place value chart teaches your child why the standard algorithm works. How powerful!
Your child sets the foundation for understanding multiplication and division in second grade. The first layer in building this foundation is a concrete understanding. He will use objects as counters to create equal groups.
Making equal groups, drawing pictures, and using repeated addition all build a strong foundation for third grade, where your child will dive right into multiplication and division!
This video addresses Common Core Grade 2 Standard Number & Operations in Base Ten: Use place value understanding and properties of operations to add and subtract.