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## Subtract single digits with a missing number

• Subtract single digits with a missing number
• Course: Mathematics
• Section: Subtraction
• Outcome: Single digit subtraction - missing number
• Activity Type: Printable
• Activity ID: 3504

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#### United Kingdom – National Curriculum expand/collapse

• ##### KS1.Ma2 – Number
• Knowledge, skills and understanding

• Calculations

• KS1.Ma2.3 – Pupils should be taught to:

• Number operations and the relationships between them

• KS1.Ma2.3.a – Understand addition and use related vocabulary; recognise that addition can be done in any order; understand subtraction as both 'take away' and 'difference' and use the related vocabulary; recognise that subtraction is the inverse of addition; give the subtraction corresponding to an addition and vice versa; use the symbol '=' to represent equality; solve simple missing number problems [for example, 6 = 2 + ? ]

• Mental methods

• KS1.Ma2.3.c – Develop rapid recall of number facts: know addition and subtraction facts to 10 and use these to derive facts with totals to 20, know multiplication facts for the x2 and x10 multiplication tables and derive corresponding division facts, know doubles of numbers to 10 and halves of even numbers to 20

• KS1.Ma2.3.e – Carry out simple calculations of the form 40 + 30 = ?, 40 + ? = 100, 56 - ? = 10; record calculations in a number sentence, using the symbols +, -, x, ÷ and = correctly [for example, 7 + 2 = 9] .

• ##### KS2.Ma2 – Number and algebra
• Knowledge, skills and understanding

• Calculations

• KS2.Ma2.3 – Pupils should be taught to:

• Number operations and the relationships between them

• KS2.Ma2.3.a – Develop further their understanding of the four number operations and the relationships between them including inverses; use the related vocabulary; choose suitable number operations to solve a given problem, and recognise similar problems to which they apply

• Mental methods

• KS2.Ma2.3.d – Recall all addition and subtraction facts for each number to 20

#### Australia – Australian Curriculum expand/collapse

• ##### Number and Algebra
• Number and place value

• ACMNA029 – Explore the connection between addition and subtraction

#### New Zealand – National Standards expand/collapse

• ##### 5.NA – Number and algebra
• 5.NA.1 – Apply additive and simple multiplicative strategies and knowledge of symmetry to:

• 5.NA.1.a – Combine or partition whole numbers

#### United States – Common Core State Standards expand/collapse

• ##### K.OA – Operations & Algebraic Thinking
• Mathematics

• K.OA.2 – Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

• ##### 1.OA – Operations & Algebraic Thinking
• Mathematics

• 1.OA.8 – Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.

• ##### 2.OA – Operations & Algebraic Thinking
• Mathematics

• 2.OA.2 – Fluently add and subtract within 20 using mental strategies. (See standard 1.OA.6 for a list of mental strategies.) By end of Grade 2, know from memory all sums of two one-digit numbers.