Adding and subtracting
Add and subtract one-digit and two-digit numbers to 20, including zero
Teaching approaches
Gakuva’s recommended starting approach is selected. You can still compare every option.
1 approach
Adding puts groups together. Subtracting takes some away. Zero means no change: 18+0 stays 18, and 18-0 stays 18. Stay within 20 and build the story before writing the answer.
Spend about 15 minutes solving one addition, one subtraction, and one zero problem within 20.
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.
Math Mine Addition Subtraction
Practice addition and subtraction by solving equations and removing numbered blocks from a mine. Pair the game with quick parent checks for one-digit and two-digit problems through 20, including zero.
Proof: Save a screenshot of the final Problems Solved count plus a parent note listing correct one-digit and two-digit examples, including addition, subtraction, and a zero case.
Explore the learning path
1 before · 2 after
Before
This concept
Check understanding
- Calculate 14 + 5 = 19
- Calculate 17 – 3 = 14
- Add or subtract 0 and explain the result stays the same
“Can your child work out sums like '14 + 5' or '18 − 6' in their head or on paper, and do they know that adding or taking away zero leaves the number unchanged?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 5–6
Standards