1st Grade Math Concepts Practiced – Common Core Standards

1.NBT.A.1 – Count to 120, starting at any number less than 120; read, write, and represent numbers with objects or numerals.
1.NBT.B.3 – Compare two two-digit numbers using the meanings of tens and ones digits, recording results with >, =, and <.
1.NBT.B.2 – Understand that the two digits of a two-digit number represent tens and ones.
1.NBT.B.2a–c – Recognize that 10 is a bundle of ten ones; 11–19 are composed of a ten and ones; larger numbers are made of tens and ones.
1.NBT.C.4 – Add within 100 using models, drawings, or strategies based on place value and properties of operations.
1.NBT.C.5 – Given a two-digit number, mentally find 10 more or 10 less without counting; explain reasoning.
1.OA.D.7 – Understand the meaning of the equal sign and determine whether equations are true or false.
1.OA.D.8 – Find the unknown number in an addition or subtraction equation relating three whole numbers.
1.G.A.1 – Identify and draw shapes based on defining attributes such as sides and corners, distinguishing from non-defining traits like color or size.