Estimate, use inverses and check recognise and use the inverse relationship between addition and subtraction and use this to check calculations and missing number problems Estimate the answer to a calculation and use inverse operations to check answers Estimate and use inverse operations to check answers to a calculation Use rounding to check answers to calculations and determine, in the context of a problem, levels of accuracy Use estimation to check answers to calculations and determine, in the context of a problem, an appropriate degree of accuracy C4 Add/subtract to solve problems 1C4 Solve one-step problems that involve addition and subtraction, using concrete objects and pictorial representations, and missing number problems such as 7 = □ – 9 2C4 Solve problems with addition and subtraction: - using concrete objects and pictorial representations, including those involving numbers, quantities and measures - applying their increasing knowledge of mental and written methods 3C4 Solve problems, including missing number problems, using number facts, place value, and more complex addition and subtraction 4C4 Solve addition and subtraction two-step problems in contexts, deciding which operations and methods to use and why 5C4 Solve addition and subtraction multi-step problems in contexts, deciding which operations and methods to use and why 6C4 addition and subtraction multi-step problems in contexts, deciding which operations and methods to use and why C5 Properties of number (multiples, factors, primes, squares and cubes) [KS2] 5C5a Identify multiples and factors, including finding all factor pairs of a number and common factors of two numbers 6C5 Identify common factors, common multiples and prime numbers 5C5b Know and use the vocabulary of prime numbers, prime factors and composite (non-prime) numbers 5C5c Establish whether a number up to 100 is prime and recall prime numbers up to 19 5C5d Recognise and use square numbers and cube numbers, and the notation for squared (²) and cubed (³) C6 2C6 3C6 4C6a 5C6a 6C6
method of short division where appropriate, interpreting remainders according to the context C8 Solve problems (commutative, associative, distributive and all four operations) 1C8 Solve one-step problems involving multiplication and division, by calculating the answer using concrete objects, pictorial representations and arrays with the support of the teacher 2C8 Solve problems involving multiplication and division, using materials, arrays, repeated addition, mental methods, and multiplication and division facts, including problems in contexts 3C8 Solve problems, including missing number problems, involving multiplication and division, including integer scaling problems and correspondence problems in which n objects are connected to m objects 4C8 Solve problems involving multiplying and adding, including using the distributive law to multiply two-digit numbers by one digit, integer scaling problems and harder correspondence problems such as n objects are connected to m objects 5C8a Solve problems involving multiplication and division including using their knowledge of factors and multiples, squares and cubes 6C8 problems involving addition, subtraction, multiplication and division 5C8b Solve problems involving addition, subtraction, multiplication and division and a combination of these, including understanding the meaning of the equals sign 5C8c Solve problems involving multiplication and division including scaling by simple fractions and problems involving simple rates C9 Order of operations 2C9a Show that addition of two numbers can be done in any order (commutative) and subtraction of one number from another cannot 6C9 Use their knowledge of the order of operations to carry out calculations involving the four operations 2C9b Show that multiplication of two numbers can be done in any order (commutative) and division of one number by another cannot