2nd Grade Math (Iowa Core)

Operations and Algebraic Thinking (OA)

• 2.OA.A.1 Solve one- and two-step addition and subtraction word problems within 100.
• 2.OA.B.2 Add and subtract within 20 fluently using mental strategies.
• 2.OA.C.3 Decide whether a group of up to 20 objects has an odd or even number of members.
• 2.OA.C.4 Find totals for equal groups and arrays by adding the same number again and again.

Number and Operations in Base Ten (NBT)

• 2.NBT.A.1 Understand that each digit in a 3-digit number shows hundreds, tens or ones.
• 2.NBT.A.2 Count forward and backward within 1,000 and skip-count by 5s, 10s and 100s.
• 2.NBT.A.3 Read and write numbers up to 1,000 in several different forms.
• 2.NBT.A.4 Compare two three-digit numbers using place value and the >, = and < symbols.
• 2.NBT.B.5 Add and subtract within 100 fluently using place-value strategies.
• 2.NBT.B.6 Add as many as four 2-digit numbers with place-value and operation-property strategies.
• 2.NBT.B.7 Add and subtract within 1,000 using models, drawings and place-value strategies.
• 2.NBT.B.8 Add or subtract 10 or 100 to or from a number between 100 and 900 mentally.
• 2.NBT.B.9 Use place value to justify why adding and subtracting strategies work.

Measurement and Data (MD)

• 2.MD.A.1 Measure an object's length with a suitable tool such as a ruler or measuring tape.
• 2.MD.A.2 Measure an object twice with two different units and explain how the results relate to unit size.
• 2.MD.A.3 Estimate lengths in inches, feet, centimeters and meters.
• 2.MD.A.4 Measure to find how much longer one object is than another in a standard unit.
• 2.MD.B.5 Solve addition and subtraction word problems about lengths given in the same units.
• 2.MD.B.6 Show whole numbers, sums and differences within 100 as lengths on a number line.
• 2.MD.C.7 Tell and write time to the nearest five minutes.
• 2.MD.IA.C.1 Iowa standard: describe how units of time relate to each other.
• 2.MD.IA.C.2 Iowa standard: identify nickels, quarters and dollar bills and know their values.
• 2.MD.C.8 Solve word problems with dollar bills and coins using the $ and ¢ symbols.
• 2.MD.D.9 Measure several lengths to the nearest whole unit and show the results on a line plot.
• 2.MD.IA.D.1 Iowa standard: collect data through interviews, surveys and observations.
• 2.MD.D.10 Draw picture graphs and bar graphs and solve problems using the data they show.

Geometry (G)

• 2.G.A.1 Recognize and draw shapes that have given attributes.
• 2.G.A.2 Divide a rectangle into equal square rows and columns and count the squares.
• 2.G.A.3 Split shapes into two, three or four equal shares and describe the shares.