The Common Core in South Dakota

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Skills available for South Dakota first-grade math standards

Standards are in black and IXL math skills are in dark green. Hold your mouse over the name of a skill to view a sample question. Click on the name of a skill to practice that skill.

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1.OA Operation and Algebraic Thinking

1.NBT Number and Operation in Base Ten

  • Extend the counting sequence.

    • 1.NBT.1 In the range of 0 - 120

      • 1.NBT.1.a Count on from any given number.

      • 1.NBT.1.b Read and write numerals.

      • 1.NBT.1.c Represent a number of objects with a written numeral.

  • Understand Place Value.

  • Use place value understanding and properties of operation to add and subtract.

    • 1.NBT.4 Add and subtract within 100.

      • 1.NBT.4.a Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

      • 1.NBT.4.b Understand that in adding two-digit numbers (sums within 100) add tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

    • 1.NBT.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

    • 1.NBT.6 Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

1.MD Measurement and Data

1.G Geometry