Multiplication with Larger Numbers
4.OA.A.3 Solve multi-step contextual problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation
4.NBT.B.5 Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area model
4.MD.A.3 Know and apply the area and perimeter formulas for rectangles in real world and mathematical problems. For example, find the width of a rectangular room given the area of the flooring and the length, by viewing the area formula as a multiplication equation with an unknown factor
WHY? : In this unit students continue using computational and problem-‐solving strategies, with a focus on building conceptual understanding of multiplication of larger numbers. Area of rectangles provide one context for developing such understanding. These standards are all listed in this unit because they support each other. You are solving contextual problems (4.OA.3) with area (4.MD.A.3) and non-measurement contexts. Standard 4.NBT.B.5 only listed here because it so closely relates to the OA and MD standard. It is NOT intended to be taught as an isolated standard. Enter your text here...