Katherine McKenzie's Teaching Video
Elementary / Math / Ratios and Proportions
4th Grade Math- 2 digit x 2 digit multiplication using the area model Standard:4.NSBT.5 Multiply up to a four digit number by a one digit number and multiply a two digit number by a two digit number using strategies based on place value, and the properties of operations. Illustrate and explain the calculation using rectangular arrays, area models, and/or equations.
