North Dakota Academic Content Standards 2nd Grade Math Skills

ND.2.OA. Operations and Algebraic Thinking

Represent and solve problems involving addition and subtraction.

2.OA.1. Use strategies to add and subtract within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions.

Add and subtract within 20.

2.OA.2. Use mental strategies to fluently add and subtract within 20.

Work with equal groups of objects to gain foundations for multiplication.

2.OA.3. Determine whether a given number of objects up to 20 is odd or even. Write an equation to represent an even number using two equal addends or groups of 2.

ND.2.NBT. Number and Operations in Base Ten

Understand place value.

2.NBT.1. Demonstrate understanding that the three digits of a three-digit number represent amounts of hundreds, tens, and ones, including:

2.NBT.1.a. 100 can be thought of as a bundle of ten tens called a “hundred”.

2.NBT.1.b. Multiples of 100 represent a number of hundreds, 0 tens, and 0 ones.

2.NBT.2. Count forward and backward from any given number within 1000. Skip-count by 5s, 10s, and 100s.

2.NBT.3. Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

2.NBT.4. Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, recording the results of comparisons with the symbols >, =, and <.

Use place value understanding and properties of operations to add and subtract.

2.NBT.5. Use strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to fluently add and subtract within 100.

2.NBT.6. Use strategies based on place value and properties of operations to add up to four two-digit numbers.

2.NBT.7. Demonstrate understanding of place value within 1000 when adding and subtracting three-digit numbers. Use concrete models or drawings and strategies based on place value, properties of operation, and/or the relationship between addition and subtraction to add and subtract within 1000. Use a written method to explain the strategy.

ND.2.MD. Measurement and Data

Measure and estimate lengths in standard units.

2.MD.1. Select and use appropriate tools to measure the length of an object.

2.MD.4. Measure to determine how much longer one object is than another, expressing the difference with a standard unit of measurement.

Relate addition and subtraction to equal intervals on a number line.

2.MD.6. Represent whole numbers on a number line diagram with equally spaced points. Represent whole-number sums and differences within 100 on a number line diagram.

Work with time and money.

2.MD.7. Tell and write time to the nearest five minutes (including quarter after and quarter to) with a.m. and p.m. using analog and digital clocks.

Represent and interpret data.

2.MD.9. Generate data by measuring lengths of objects to the nearest whole standard unit. Show the measurements by making a line plot, using a horizontal scale marked off in whole-number units.

2.MD.10. Draw picture graphs and bar graphs with single-unit scales to represent data sets with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a bar graph.

ND.2.G. Geometry

Reason with shapes and their attributes (squares, circles, triangles, rectangles, trapezoids, rhombuses, pentagons, hexagons, octagons, parallelograms, quadrilaterals, cubes, spheres, cylinders, cones, triangular prisms, and rectangular prisms).

2.G.1. Identify trapezoids, rhombuses, pentagons, hexagons, octagons, parallelograms, quadrilaterals, cubes, spheres, cylinders, cones, triangular prisms, rectangular prisms. Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces.

2.G.3. Partition circles and rectangles into two, three, or four equal shares. Describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that identical wholes can be equally divided in different ways. Demonstrate understanding that partitioning shapes into more equal shares creates smaller shares.