Measurement and Data Measure and estimate lengths in standard units AR.Math.Content.2.MD.A.1 Measure the length of an object by selecting and appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes AR.Math.Content.2.MD.A.2 Measure the length of an object with two different length units Describe how the two measurements relate to the size of the unit chosen For example: A desktop is measured in both centimeters and inches. Student compares the size of the unit of measure and the number of units. AR.Math.Content.2.MD.A.3 Estimate lengths using units of inches, feet, centimeters, and meters AR.Math.Content.2.MD.A.4 Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit Measurement and Data Relate addition and subtraction to length AR.Math.Content.2.MD.B.5 Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, and write equations with a symbol for the unknown number to represent the problem AR.Math.Content.2.MD.B.6 Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and solve addition and subtraction problems within 100 on the number line diagram
Number and Operations in Base Ten Generalize place value understanding for multi-digit whole numbers AR.Math.Content.4.NBT.A.1 Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right For example: Recognize that 700 ÷ 70 = 10 or 700 =10x70 by applying concepts of place value and division. AR.Math.Content.4.NBT.A.2 Read and multi-digit whole numbers using base-ten numerals, number names, and expanded form Compare two multi-digit numbers based on meanings of the digits in each place, using symbols (>, =, <) to record the results of comparisons AR.Math.Content.4.NBT.A.3 Use value understanding to round multi-digit whole numbers to any place Number and Operations in Base Ten Use place value understanding and properties of operations to perform multi-digit arithmetic AR.Math.Content.4.NBT.B.4 Add and subtract multi-digit whole numbers with computational fluency using a standard algorithm Notes: Computational fluency is defined as a student’s ability to efficiently and accurately solve a problem with some degree of flexibility with their strategies. A standard algorithm can be viewed as, but should not be limited to, the traditional recording system. A standard algorithm denotes any valid base-ten strategy. AR.Math.Content.4.NBT.B.5 Multiply a 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 area models Note: Properties of operations need to be referenced.
Geometry Draw and identify lines and angles, and classify shapes by properties of their lines and angles AR.Math.Content.4.G.A.1 Draw points, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines Identify these in two-dimensional figures AR.Math.Content.4.G.A.2 Classify two-dimensional figures on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size Recognize triangles as a category and identify right triangles Note: Trapezoids will be defined to be a quadrilateral with at least one pair of opposite sides parallel, therefore all parallelograms are trapezoids. AR.Math.Content.4.G.A.3 Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts Identify line-symmetric figures and draw of symmetry