Search Results For “odd numbers”

Use the standard written method to subtract numbers in the thousands. Check by adding the answer to the lower number in the sum.

Use knowledge of factors to help with multiplying and dividing larger numbers: quite difficult concepts.

How about trying to multiply by 14 or 16 in your head?

The prime factors of a number are the factors which are also prime numbers. They can be found by using a factor tree.

Using the standard written method to multiply 2-digit numbers.

Square roots and cube roots. Only a very few numbers have a cube root which is an exact whole number. One way to find the cube root of a number is by trial and improvement.

Revision of the main concepts involved with the mental division of numbers. A reminder that a fraction is like a division sum.

Working with co-ordinates in all four quadrants, using positive and negative numbers.

Something different here: the mathematical sign and a number are both missing.

Sets of quick mental arithmetic questions. Subtracting single digits and 2-digit numbers.

Put the numbers in the boxes so that the total of the row across adds up to the same as the total of the column down. Several ways to do this, leading to further investigations.

Find a route through the maze from IN to OUT adding the numbers as you go.