Flash FeedEngland · KS2 Maths
KS2 Maths: Informal and mental strategies for adding and subtracting two 3-digit numbers flashcards
Words and mental strategies for adding and subtracting 3-digit numbers.. 29 cards to learn: tap one to flip it.
The cards
Where this deck sits in the curriculum
- Curriculum
- National Curriculum for England
- Stage
- Key stage 2 (Years 3–6)
- Course
- KS2 Maths
- Unit
- Informal and mental strategies for adding and subtracting two 3-digit numbers
England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked
On 2026-11-05, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
Sources
Total: 9 · primary: 9 · second publisher: 0
- Primary source Add two 3-digit numbers using partitioning (opens in a new tab) (Oak National Academy, thenational.academy)
- Primary source Add two 3-digit numbers using adjusting strategies (opens in a new tab) (Oak National Academy, thenational.academy)
Show the other sources (7)
- Primary source Add 2 and 3-digit numbers by redistributing (opens in a new tab) (Oak National Academy, thenational.academy)
- Primary source Choose the most efficient strategy to add two 3-digit numbers (opens in a new tab) (Oak National Academy, thenational.academy)
- Primary source Subtract 2 or 3-digit numbers using partitioning and bridging a multiple of 10 (opens in a new tab) (Oak National Academy, thenational.academy)
- Primary source Subtract a pair of 2-digit numbers by finding the difference (opens in a new tab) (Oak National Academy, thenational.academy)
- Primary source Subtract 3-digit multiples of 10 by finding the difference between them (opens in a new tab) (Oak National Academy, thenational.academy)
- Primary source Choose the most efficient strategy to subtract from a 3-digit number (opens in a new tab) (Oak National Academy, thenational.academy)
- Primary source Use addition and subtraction to solve problems involving bar charts, pictograms and tables (opens in a new tab) (Oak National Academy, thenational.academy)
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A Maths lesson by Oak National Academy licensed under Open Government Licence (OGL)