Block 2b: Multiplication and Division

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.

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 practice with using the long division method.

More short division practice. When dividing money don't forget to work to two decimal places.

Dividing by multiples of ten with no remainders.

How can you tell if a number is divisible by 4 without actually carrying out the division calculation?

How can you tell if a number is divisible by 8 without actually carrying out the division calculation?

There is a nifty way of finding if a large number is divisible by 3, but you do need to know the 3 times table.

To see if a number is divisible by 6 we have to use the tests of divisibility for 2 and 3.

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.

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.

Rule: solve the brackets first.