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**(KS1 > Mathematics (National Curriculum) > Number > Calculations) :-**2. understand multiplication as repeated addition; understand that halving is the inverse of doubling and find one half and one quarter of shapes and small numbers of objects; begin to understand division as grouping (repeated subtraction); use vocabulary associated with multiplication and division Mental methods View games for this curriculum aim**(KS1 > Mathematics (National Curriculum) > Number > Calculations) :-**1. 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 + ? ] View games for this curriculum aim**(KS1 > Mathematics (National Curriculum) > Number > Calculations) :-**3. 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 View games for this curriculum aim**(KS1 > Mathematics (National Curriculum) > Number > Calculations) :-**5. carry out simple calculations of the form 40 + 30 = ?, 40 + ? = 100, 56 - ? = 10; record calculations in a number sentence, using the symbols +, -, x , รท and = correctly [for example, 7 + 2 = 9] . View games for this curriculum aim**(KS1 > Mathematics (National Curriculum) > Number > Problem solving) :-**approach problems involving number, and data presented in a variety of forms, in order to identify what they need to do View games for this curriculum aim**(KS2 > Mathematics (National Curriculum) > Breadth of study > Misc) :-**activities that extend their understanding of the number system to include integers, fractions and decimals View games for this curriculum aim