Your child continues to use tape diagrams as a visual tool to solve word problems. Your child continues to use tape diagrams as a visual tool to solve word problems. Now, he solves for an unknown ...

Add 3-digit and 2-digit numbers. Learn how to add 3-digit and 2-digit numbers using the column method. ... Explore how to use mental methods for addition and subtraction.

Column subtraction is a way of subtracting larger numbers. It is called column subtraction, ... Slide 1 of 2, Column subtraction showing the number 54 in a place ... Addition and subtraction methods.