Essential Question: How can we efficiently add and subtract multi-digit whole numbers using the standard algorithm?
Focus Standards
Operations and Algebraic Thinking: Students will extend understanding of multiplication and division and apply operational properties to solve problems involving variables.
4.A.1.a Add and subtract multi-digit numbers using an algorithm.
4.A.1.e Create a simple algebraic expression or equation using a variable for an unknown number to represent an authentic mathematical situation (e.g., 3 + n = 15, 81 ÷ n = 9).
4.A.1.f Solve one- and two-step authentic problems using the four operations including interpreting remainders and the use of a letter to represent the unknown quantity.
Area and Perimeter: Students will apply perimeter and area formulas for rectangles.
4.G.3.a Apply perimeter and area formulas for rectangles to solve authentic problems.
