# Grade 1 Mathematics Standards (Georgia) > Georgia Standards of Excellence: Mathematics, Grade 1. 7 standards. > Source: https://georgiahomeroom.org/standards/math/grade-1 > Interactive explorer: https://georgiahomeroom.org/explorer?subject=math&grade=01 ## Numerical Reasoning (NR) Numerical Reasoning. Place value, fractions, decimals, integers — the spine of K-8 number sense. ### 1.NR.1: Count Sequence to 120 Extend the count sequence to 120. Read, write, and represent numerical values to 120 and compare numerical values to 100. - **1.NR.1.1**: Count within 120, forward and backward, starting at any number. In this range, read and write numerals and represent a number of objects with a written numeral. - **1.NR.1.2**: Explain that the two digits of a 2-digit number represent the amounts of tens and ones. - **1.NR.1.3**: Compare and order whole numbers up to 100 using concrete models, drawings, and the symbols >, =, and <. ### 1.NR.2: Addition & Subtraction Relationship Explain the relationship between addition and subtraction and apply the properties of operations to solve real-life addition and subtraction problems within 20. - **1.NR.2.1**: Use a variety of strategies to solve addition and subtraction problems within 20. - **1.NR.2.2**: Use pictures, drawings, and equations to develop strategies for addition and subtraction within 20 by exploring strings of related problems. - **1.NR.2.3**: Recognize the inverse relationship between subtraction and addition within 20 and use this inverse relationship to solve authentic problems. - **1.NR.2.4**: Fluently add and subtract within 10 using a variety of strategies. - **1.NR.2.5**: Use the meaning of the equal sign to determine whether equations involving addition and subtraction are true or false. - **1.NR.2.6**: Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. - **1.NR.2.7**: Apply properties of operations as strategies to solve addition and subtraction problem situations within 20. ### 1.NR.5: Addition and Subtraction Within 100 Use concrete models, the base ten structure, and properties of operations to add and subtract within 100. - **1.NR.5.1**: Use a variety of strategies to solve applicable, mathematical addition and subtraction problems with one- and two-digit whole numbers. - **1.NR.5.2**: Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. - **1.NR.5.3**: Add and subtract multiples of 10 within 100. ## Patterning & Algebraic Reasoning (PAR) Patterning & Algebraic Reasoning. Patterns build into expressions and equations across K-8. ### 1.PAR.3: Repeating and Growing Patterns Identify, describe, extend, and create repeating patterns, growing patterns, and shrinking patterns found in real-life situations. - **1.PAR.3.1**: Investigate, create, and make predictions about repeating patterns with a core of up to 3 elements resulting from repeating an operation, as a series of shapes, or a number string. - **1.PAR.3.2**: Identify, describe, and create growing, shrinking, and repeating patterns based on the repeated addition or subtraction of 1s, 2s, 5s, and 10s. ## Measurement & Data Reasoning (MDR) Measurement & Data Reasoning. Length, time, money, and graphical data displays in K-5. ### 1.MDR.6: Measurement & Data Overview Use appropriate tools to measure, order, and compare intervals of length and time, as well as denominations of money to solve real-life, mathematical problems and analyze graphical displays of data to answer relevant questions. - **1.MDR.6.1**: Estimate, measure, and record lengths of objects using non-standard units, and compare and order up to three objects using the recorded measurements. Describe the objects compared. - **1.MDR.6.2**: Tell and write time in hours and half-hours using analog and digital clocks, and measure elapsed time to the hour on the hour using a predetermined number line. - **1.MDR.6.3**: Identify the value of quarters and compare the values of pennies, nickels, dimes, and quarters. - **1.MDR.6.4**: Ask questions and answer them based on gathered information, observations, and appropriate graphical displays to compare and order whole numbers. ## Geometric & Spatial Reasoning (GSR) Geometric & Spatial Reasoning. Shapes, area, volume, and transformations from K through high school. ### 1.GSR.4: Shape Composition and Attributes Compose shapes, analyze the attributes of shapes, and relate their parts to the whole. - **1.GSR.4.1**: Identify common two-dimensional shapes and three-dimensional figures, sort and classify them by their attributes and build and draw shapes that possess defining attributes. - **1.GSR.4.2**: Compose two-dimensional shapes (rectangles, squares, triangles, half-circles, and quarter-circles) and three-dimensional figures (cubes, rectangular prisms, cones, and cylinders) to create a shape formed of two or more common shapes and compose new shapes from the composite shape. - **1.GSR.4.3**: Partition circles and rectangles into two and four equal shares. ## Mathematical Practices (MP) Mathematical Practices. Cross-grade habits of mind: perseverance, precision, argument. ### 1.MP: Mathematical Practices Overview Display perseverance and patience in problem-solving. Demonstrate skills and strategies needed to succeed in mathematics, including critical thinking, reasoning, and effective collaboration and expression. Seek help and apply feedback. Set and monitor goals. - **1.MP.1**: Make sense of problems and persevere in solving them. - **1.MP.2**: Reason abstractly and quantitatively. - **1.MP.3**: Construct viable arguments and critique the reasoning of others. - **1.MP.4**: Model with mathematics. - **1.MP.5**: Use appropriate tools strategically. - **1.MP.6**: Attend to precision. - **1.MP.7**: Look for and make use of structure. - **1.MP.8**: Look for and express regularity in repeated reasoning.