The number system is used to represent and compare relationships between numbers and quantities.
Write numbers using words
Write numbers using digits
Write numbers using digits and words
Write numbers using words
Write numbers using digits
Write numbers using digits and words
Addition skill builders
Addition sentences within 10
Add within 10
Addition word problems within 10
Addition sentences within 20
Add within 20
Addition word problems within 20
Add a two-digit number and a one-digit number
Regroup tens and ones
Two-digit addition
Addition word problems up to two digits
Addition strategies
Add multiples of 10
Subtraction skill builders
Subtraction sentences within 10
Subtract within 10
Subtraction word problems within 10
Subtraction sentences within 20
Subtract within 20
Subtraction word problems within 20
Subtraction strategies
Subtract a two-digit number and a one-digit number
Subtract two-digit numbers
Subtraction word problems up to two digits
Subtract multiples of 10
Relate addition and subtraction
Add and subtract within 10
Add and subtract within 20
Add and subtract multiples of 10
Add and subtract within 100
Addition and subtraction terms
Addition skill builders
Addition sentences within 10
Add within 10
Addition word problems within 10
Addition sentences within 20
Add within 20
Addition word problems within 20
Add a two-digit number and a one-digit number
Regroup tens and ones
Two-digit addition
Addition word problems up to two digits
Addition strategies
Add multiples of 10
Subtraction skill builders
Subtraction sentences within 10
Subtract within 10
Subtraction word problems within 10
Subtraction sentences within 20
Subtract within 20
Subtraction word problems within 20
Subtraction strategies
Subtract a two-digit number and a one-digit number
Subtract two-digit numbers
Subtraction word problems up to two digits
Subtract multiples of 10
Relate addition and subtraction
Add and subtract within 10
Add and subtract within 20
Add and subtract multiples of 10
Add and subtract within 100
Addition and subtraction terms
Algebra uses symbol systems to express the structure of mathematical relationships.
Geometry focuses on relationships involving shape, space and position, and measurement focuses on quantifying phenomena in the physical world.
Statistics represent data, probability models chance, and both support informed inferences and decisions.