Block 2b: Multiplication and Division
A selection of pages covering multiplication and division using mental and written methods, including the standard method to multiply and divide large numbers.
Written multiplication using both the long and short methods.
The short multiplication method described, with practice pages multiplying 3-digit numbers by a single digit.
Using the formal written method and squared paper to multiply 4-digit numbers by 2-digit.
Multiplying 4-digit numbers by 2-digit numbers using the formal written method of multiplication.
The standard, or efficient method of multiplying two 2-digit numbers.
Use knowledge of tables to multiply 6-digit numbers.
Written division using both the short and long division methods.
Dividing 4-digit numbers by 2-digit numbers using the short division method, with squares to help.
Use long division method, with squared paper.
More short division practice. When dividing money don't forget to work to two decimal places.
Dividing by multiples of ten with no remainders.
Factors, prime and square numbers
Understanding factors and recognising prime and square numbers. Understanding the importance of the order of operations.
Finding common multiples of pairs of numbers.
Use knowledge of factors to help with multiplying and dividing larger numbers: quite difficult concepts.
Reminder: the factors of a number are those numbers that divide exactly into it, without leaving a remainder. A number which only has factors of 1 and itself is called a prime number.
The prime factors of a number are the factors which are also prime numbers. They can be found by using a factor tree.
More on square and cube numbers. You may have noticed that cube numbers start getting pretty big, pretty quickly.
Order of operations
Understanding the importance of the order of operations.
Remember, in a number sentence where there are several operations we need to stick to some rules.
Rule: multiply or divide before adding or subtracting.