# Addition and Subtraction Within 20

- Link: https://thecuriosi.com/courses/addition-subtraction-within-20/
- Published: 2026-11-01T05:07:20+05:30
- Author: MAHENDRA MANCHIKALAPATI

**Addition and subtraction for kids** begin with clear, useful ideas: joining groups,
taking some away, and finding how many remain. In this beginner course, children
use small objects, number lines, drawings, and familiar stories to understand sums
within 20. The goal is to make sense of each problem and choose a strategy that 
feels helpful.

The eight lessons move from hands-on counting to flexible thinking. Learners first
join and separate groups, then use number lines to count forward and backward. They
practise doubles, use pairs that make ten, and see how addition and subtraction 
facts belong together. In the final lessons, they solve everyday word problems and
create a small math story of their own.

## What you will learn

 * Show addition as joining groups and subtraction as taking away
 * Use objects, drawings, and a number line to solve problems within 20
 * Use doubles and near doubles to find sums
 * Break numbers apart to make ten and solve related facts
 * Choose an operation in a simple word problem and explain the answer

## Who this course is for

This course is for children around ages 6 to 8 in Grades 1 and 2, and for other 
early learners who want more practice. Parents, teachers, and caregivers can read
the examples aloud and help learners use everyday objects as counters.

## Prerequisites

Learners should be comfortable counting small groups and recognising some numbers
up to 20. They do not need to memorise every addition or subtraction fact before
beginning. Paper, a pencil, and up to 20 small safe counters—such as blocks, buttons,
or paper squares—are useful but optional.

## A note for parents and teachers

Children may use different strategies and still reach the same correct answer. Encourage
them to show how they thought, then compare another method. Use counters that are
too large to swallow and supervise young children. If a learner is unsure, return
to a smaller number and build up slowly. Keep practice calm and celebrate careful
thinking.

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