Learn how to estimate the area of a rectangle. Round the length and width measurements and then multiply them to estimate the area. This allows you to quickly calculate an approximate area
A. Factor out 10, 100, or 1,000 from a given number
B. Solve multiplication problems using the associative and commutative properties
C. Solve a multi-digit multiplication problem using factoring out and properties of multiplication (Level 1)
D. Solve a multi-digit multiplication problem mentally
E. Solve a multi-digit multiplication problem using factoring out and properties of multiplication (Level 2)
G. Round multi-digit numbers to estimate the product