Addition Table
One way of remembering what different pairs of numbers add up to is with an addition table. By memorising some or all of an addition table you can quickly know what different pairs of numbers added together equal without actually having to work out the equation. Here is my addition table that goes up to 10.
Subtraction Table
Subtraction tables are useful for remembering small, specific subtraction equations. By memorising them you can quickly solve small, simple problems without working out the equation. Here is my subtraction table for numbers up to 10.
Note: Grey squares are negative numbers which I haven't included in this for the sake of not making things too complicated. Also the numbers here are worked out as top number minus the left number.