2nd Grade Math (South Dakota Content Standards)

Operations and Algebraic Thinking (OA)

• 2.OA.1 Solve one- and two-step addition and subtraction word problems within 100 with unknowns anywhere.
• 2.OA.2 Add and subtract within 20 fluently with mental strategies.
  • 2.OA.2a Use mental strategies to add and subtract within 20.
  • 2.OA.2b Know all sums of two one-digit numbers from memory.
• 2.OA.3 Decide if a group of up to 20 objects is odd or even and write even numbers as sums of two equal addends.
• 2.OA.4 Find the total in arrays up to 5 by 5 by addition and write an equation.

Number and Operations in Base Ten (NBT)

• 2.NBT.1 Understand that three-digit numbers show hundreds, tens and ones.
  • 2.NBT.1a See ten tens grouped together as one hundred.
  • 2.NBT.1b See 100, 200 … 900 as that many hundreds and no tens or ones.
• 2.NBT.2 Count within 1,000 and skip-count by 5s, 10s and 100s.
• 2.NBT.3 Read and write numbers to 1,000 in standard, word and expanded form.
• 2.NBT.4 Compare three-digit numbers using >, = and <.
• 2.NBT.5 Add and subtract within 100 fluently using place-value strategies.
• 2.NBT.6 Add as many as four 2-digit numbers with place-value strategies.
• 2.NBT.7 Add and subtract within 1,000 using models or strategies, making or breaking units as needed.
• 2.NBT.8 Add or subtract 10 or 100 to or from numbers 100–900 mentally.
• 2.NBT.9 Use place value and operation properties to justify why adding and subtracting strategies work.

Measurement and Data (MD)

• 2.MD.1 Measure length with rulers, yardsticks, meter sticks and tape measures.
• 2.MD.2 Measure an object with two different units and explain how the results relate.
• 2.MD.3 Estimate lengths in inches, feet, centimeters and meters.
• 2.MD.4 Measure the length difference between two objects in standard units.
• 2.MD.5 Solve addition and subtraction word problems within 100 about lengths in the same units.
• 2.MD.6 Use a number line to show whole numbers and sums or differences up to 100.
• 2.MD.7 Read and record time to 5 minutes, marking a.m. or p.m.
• 2.MD.8 Identify and count coins and bills and solve money word problems using $ and ¢.
  • 2.MD.8a Recognize coins and know their values up to one dollar.
  • 2.MD.8b Solve word problems with bills and coins using $ and ¢ correctly.
• 2.MD.9 Measure several objects, or one object several times, and show the data on a line plot.
• 2.MD.10 Draw picture and bar graphs with up to four categories and solve problems with them.

Geometry (G)

• 2.G.1 Recognize and draw shapes with given attributes such as angles or equal faces.
• 2.G.2 Split a rectangle into rows and columns of equal squares and count them.
• 2.G.3 Cut circles and rectangles into 2, 3 or 4 equal parts (halves, thirds, fourths).