Adding and subtracting
Add and subtract one-digit and two-digit numbers to 20, including zero
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1590 concepts · 8 subjects
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Teaching approaches
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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.
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Learning resources
External links for extra practice. They do not replace Gakuva’s teaching approach.
Toy Theater · Practice link — not the full lesson
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.
Free · no login · ads
Review and open practice
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.
Opening this link does not save learning or assess mastery.
Open practice (new tab)Source, access and review notes
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.
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.
Free · no login · ads
Unknown — link only
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