Addition facts to 20 are understood as exact relationships among nonnegative whole-number quantities whose sums range from 0 through 20. Fluency includes recognizing commutative pairs, doubles, make-ten combinations, and decompositions such as , enabling facts to be recalled or derived from known facts rather than counted by ones; this supports efficient mental subtraction and later place-value computation, without extending to larger multi-digit sums.
On this page:
- Learn “Recall addition facts to 20” with a detailed explanation of the concept
- Master “Recall addition facts to 20” with unlimited, free practice problems
- Download (or modify) a free worksheet on Recall addition facts to 20 you can use at home or in class with practice problems that scaffold and explore “Recall addition facts to 20” from different perspectives.
- Start working on adaptive units like “Addition and Subtraction of Integers - 1 Digit” or “Ten Groups - Adding” that introduce, teach, or practice “Recall addition facts to 20” to maximize your learning.
Detailed Explanation: Recall addition facts to 20
Addition facts to 20 can be recalled by using facts you already know. One helpful strategy is to make 10.
Example: Find .
- Start with . It needs more to make .
- Split into .
- Add the to 3$:
- Make 10 first:
So,
You can also remember the commutative pair:
Learn by doing: Recall addition facts to 20
Click a topic below to practice the foundational skills you'll need, learn the steps, or master this skill
Your results
Practice with unlimited practice problems
Practice:
Ten Groups - Add, With Carry, Less than 20
Earned ?
Download/Modify Free Grade 2 'Recall addition facts to 20' Worksheet
Print this free 'Recall addition facts to 20' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Ten Groups - Add, With Carry, Less than 20
- Addition - Whole Number 1 digit + 1 digit, No Carry
- Addition - Whole Number 1 digit + 1 digit, With Carry
- Addition - Whole Number - Within 20 - Column
- Picture Numbers - Adding - Picture to Word (Within 20)
- Ten Groups - Add, Without Carry, Less than 20
- Ten Groups - Add, Without Carry, Less than 10
- Ten Groups - To Next Ten, One Digit, Less than 10
Units Teaching This Skill
These adaptive units introduce, teach, or reinforce this skill (Recall addition facts to 20) through scaffolded problems that grow in difficulty as concepts are understood.