Adding and subtracting
Add and subtract one-digit and two-digit numbers to 20, including zero
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1858 concepts · 9 subjects
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Teaching approaches
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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
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Toy Theater · Practice link — not the full lesson
Math Mine Addition Subtraction
Before you open · source 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.
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Before you openSave 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.
Source, access and review notes
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 5–7
Standards