Quickly recall addition facts with totals up to 20.
Where your child meets this in real life: Quick mental calculations in shopping, games, or everyday counting
SEAGReady breaks addition facts to 20 into 2 steps, taught in order so each skill builds on the last.
supporting lesson — excluded from official-format mocks
Recall addition facts where the sum is 10 or less (e.g., 3 + 4 = 7)
supporting lesson — excluded from official-format mocks
Recall addition facts where the sum is between 11 and 20 (e.g., 8 + 5 = 13)
Three free sample questions from our addition facts to 20 course. Every question comes with a full explanation, and hints that guide without giving the answer away.
Olivia has 4 red apples. She picks 3 more green apples. How many apples does she have altogether?
Kyle has 9 marbles. He wins 4 more marbles. How many marbles does he have now?
There are 6 children on the school bus. 3 more children get on at the next stop. How many children are on the bus now?
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Lucy has 4 red apples in her bag. She picks 5 more green apples from the tree.
How many apples does Lucy have altogether?
4 + 5
Start with the 4 red apples.
4
Step 1 of 4
Lucy has 4 red apples in her bag. She picks 5 more green apples from the tree.
How many apples does Lucy have altogether?
Lucy has 9 apples altogether.
The key insight: Number bonds within 10 are facts you can recall instantly!
Common mix-up: 4 + 5 = 8. Counting on fingers but starting from 4 instead of the next number.
These are the misconceptions we see most often in addition facts to 20, including the ones our practice questions are specifically designed to catch.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.
Free to start · no card needed