2nd Grade Math (Ohio's Learning Standards)

Operations and Algebraic Thinking (2.OA)

• 2.OA.1 Solve one- and two-step addition and subtraction word problems within 100 with drawings and equations with unknowns.
• 2.OA.2 Know from memory all sums of two one-digit numbers and add and subtract within 20 mentally.
• 2.OA.3 Decide whether a group of up to 20 objects is odd or even and write even numbers as a sum of two equal addends.
• 2.OA.4 Use addition to find the total in rectangular arrays up to 5 by 5 and write equal-addend equations.

Number and Operations in Base Ten (2.NBT)

• 2.NBT.1 Understand the digits of a three-digit number as hundreds, tens and ones.
  • a. Understand 100 as a bundle of ten tens.
  • b. Understand multiples of 100 up to 900 as whole hundreds.
• 2.NBT.2 Count forward and back within 1,000 by ones, tens and hundreds, and skip-count by fives.
• 2.NBT.3 Read and write numbers to 1,000 in numerals, words, expanded form and equivalent forms.
• 2.NBT.4 Compare three-digit numbers using place value and record with >, = and <.
• 2.NBT.5 Add and subtract within 100 fluently using place value, properties and the inverse relationship.
• 2.NBT.6 Add up to four two-digit numbers using place value strategies and properties.
• 2.NBT.7 Add and subtract within 1,000 using models and place value strategies, composing or decomposing as needed; explain.
• 2.NBT.8 Mentally add or subtract 10 or 100 to or from a number from 100 to 900.
• 2.NBT.9 Explain why addition and subtraction strategies work using place value and properties, with drawings or objects.

Measurement and Data (2.MD)

• 2.MD.1 Measure lengths by choosing suitable tools such as rulers, yardsticks, meter sticks and tapes.
• 2.MD.2 Measure an object twice with different-size units and explain how unit size changes the measurement.
• 2.MD.3 Estimate lengths in inches, feet, centimeters and meters.
• 2.MD.4 Measure how much longer one object is than another in a standard unit.
• 2.MD.5 Solve length word problems within 100 in the same unit using drawings and equations.
• 2.MD.6 Show whole numbers as equally spaced points on a number line from 0 and show sums and differences within 100.
• 2.MD.7 Tell and write time to the nearest five minutes on analog and digital clocks, using a.m. and p.m.
• 2.MD.8 Solve problems with money.
  • a. Identify nickels and quarters by name and value.
  • b. Find the value of a set of quarters, dimes, nickels and pennies.
  • c. Solve dollar or cent word problems using $ or ¢ correctly, not both together.
• 2.MD.9 Measure lengths of several objects to whole units and show the data on a line plot.
• 2.MD.10 Organize and interpret data with up to four categories in picture and bar graphs with single-unit scales.

Geometry (2.G)

• 2.G.1 Identify triangles, quadrilaterals, pentagons and hexagons by sides or vertices, and recognize cubes, prisms, cones and cylinders.
• 2.G.2 Split a rectangle into rows and columns of same-size squares and count to find the total.
• 2.G.3 Split circles and rectangles into halves, thirds or fourths and describe the whole in those terms.