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1st Grade Math

Idaho 1st Grade Math Curriculum

Video lessons and practice for every 1st grade math topic. Aligned to Idaho Content Standards Math so your child learns exactly what Idaho schools teach.

Idaho 1st Grade Math Curriculum | StudyPugHelp

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1.OA.A.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20

1.OA.B.3

Apply properties of operations as strategies to add and subtract

1.OA.B.4

Understand subtraction as an unknown-addend problem

1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10

1.OA.D.7

Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false

1.NBT.B.2

Understand that the two digits of a two-digit number represent amounts of tens and ones

1.NBT.B.3

Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <

1.NBT.C.5

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count

1.G.A.3

Partition circles and rectangles into two and four equal shares

Idaho 1st Grade Math: What Students Learn

Idaho 1st grade math covers a wide range of foundational skills that set students up for success in later grades. Following Idaho Content Standards Math, students in 1st grade develop fluency with addition and subtraction, learn to work with two-digit numbers, measure objects, tell time, and recognize shapes. StudyPug provides video lessons and practice problems for every one of these topics.

Addition and Subtraction Skills

A large part of 1st grade math focuses on addition and subtraction within 20. Students learn to solve word problems, add three whole numbers, apply properties of operations, and understand subtraction as finding an unknown addend. They also build fluency for addition and subtraction within 10 and learn what the equal sign really means.

  • Addition and subtraction within 20 using word problems
  • Adding three whole numbers with sums up to 20
  • Properties of operations as strategies
  • Understanding subtraction as an unknown-addend problem
  • Equations with true or false values

Place Value and Number Sense

1st graders learn that two-digit numbers are made of tens and ones. They count to 120, compare two-digit numbers using >, =, and <, and practice adding within 100. Students also learn to mentally find 10 more or 10 less than any two-digit number and subtract multiples of 10.

  • Counting to 120 from any starting number
  • Understanding tens and ones in two-digit numbers
  • Comparing two-digit numbers with >, =, and <
  • Adding a two-digit number and a one-digit number
  • Subtracting multiples of 10

Measurement, Time, and Data

Students begin measuring objects, ordering them by length, and expressing length as a whole number of units. They learn to tell and write time in hours and half-hours on analog and digital clocks. Data skills include organizing and interpreting information across up to three categories.

Geometry

1st grade geometry introduces defining versus non-defining attributes of shapes. Students build and draw shapes, compose two-dimensional and three-dimensional shapes into composite shapes, and begin partitioning circles and rectangles into equal shares — laying the groundwork for fractions in later grades.