Numbers and Operations

Sample lesson - Grade 3: numbers and operations.  Explore fractions with Michiko at the kite factory.

Sample Lesson: Click to Play

Grade 3: numbers and operations.  Explore fractions with Michiko at the kite factory.

Sample lesson - Grade 3: numbers and operations.  Explore fractions with Michiko at the kite factory.

Grade 3 Numbers & Operations

Explore fractions with Michiko at the kite factory.

K5 builds numeracy and confidence

Confidence and competency in basic arithmetic lies at the heart of success in math.

Our numbers and operations program has over 300 online activities covering elementary school arithmetic, from learning to count, to addition and subtraction, fractions and beyond.

Avoid math anxiety by learning arithmetic online

We believe every kid is capable of mastering arithmetic. With K5, students learn at their level and at their own pace in an environment that is completely patient and impartial. Our online math lessons provide immediate feedback and positive reinforcement to keep your child motivated and engaged.

Concepts before drills

It’s critical that kids gain a full understanding of concepts in math before embarking on practice and drills. Our online math lessons provide full instruction, not just quizzes.

Real-world scenarios build deeper understanding

Each of our number operations lessons uses interactive, animated real-world scenarios to teach math concepts. For example, kids learn the meaning of subtraction by helping rabbits jump off a diving board at a swimming pool. It’s critical that kids learn arithmetic in a tangible, not an abstract way.

Virtual manipulatives and models give meaningful interaction

Virtual counters, ones, tens and hundreds blocks, and other tools are used extensively. In one lesson, a model of an array is used to represent two digit multiplication problems, clearly demonstrating the concept being learned in a tangible manner.

300+ numbers and operations activities

  • Numbers and counting
  • ordinal numbers
  • addition and subtraction
  • text and numbers
  • counting by grouping
  • place value
  • multiplication and division
  • operations with fractions
  • rounding
  • factors and multiples
  • problem solving
  • ratios
  • objects and sets
  • the number line
  • building number sentences
  • odd and even numbers
  • number system
  • comparing and ordering numbers
  • fractions, equivalent fractions, improper fractions
  • least common denominator
  • estimating
  • decimals and percents
  • powers of 10
  • prime and composite numbers.

We place your child at the right instruction level

K5 kids start by completing a free online math assessment.  Kids are then placed in math lessons at their skill level, avoiding the boredom and frustration associated with lessons that are too easy or too hard.

What is K5?

K5 Learning is an online reading and math program for kids in kindergarten to grade 5. Kids work at their own level and their own pace through a personalized program of reading and math lessons; each lesson is accompanied by customized printable worksheets for further study.

Designed principally for after school study and summer study, K5 is also used by homeschoolers, special needs and gifted kids. K5 helps your children build good study habits and excel in school. 

Free trial

K5 Learning offers a 14-day free trial of its complete program. The free trial includes optional free reading and math assessments.

Start 14 Day Free Trial