Multiplication and understanding factors in Year 5 Arrays and multiplication are useful tools to help children understand what factors are. We have just published two sets of worksheets on identifying factors in the context of multiplication and division. The first uses children’s knowledge of tables to find factors: for example, if 5 x 2 = 10 then 5 and 2 are factors of 10. The second new set of worksheets uses division in a similar way: for example, if 12 ÷ 2 = 6 then 2 and 6 are factors of 12. Once children have a clear understanding of factors they can then move on to finding all the factors of a number and later, to find the common factors of two numbers. To make it easier to find the exact resources you are looking for we have recently sub-divided our Multiplication category into 6 sub sections, as follows: Revise understanding of multiplication Here we look at multiplying by zero or one as well as reinforcing doubling and halving. Use known facts to multiply There are a number of techniques that can be used to make mental methods of multiplication quick and easy, as long as the basic facts are known. For example, multiplying a number by 19 can be done by multiplying the number by 20 and then subtracting the number from the answer. Written methods of multiplication By the end of the year children should be able to use the formal written method of long multiplication to multiply a 4-digit number by a 2-digit number; but there are many children who will still need considerable help and support with the whole idea of written multiplication. Multiples and factors An introduction to multiples and factors. Take a look at our most recent resources. Prime and square numbers Favourite topics with the KS2 SAT writers, children need to know what prime numbers are and be familiar with square numbers. Further multiplication activities Word problems using multiplication and checking answers are included in this section. Go to Year 5 Multiplication