Properties of numbers

When 0 is added to any number, we get

• 0

• 1

• the same number

• next number

we get 0 when

• any number is subtracted from it

• when two same numbers are subtracted

• when 0 is multiplied with any number

• when any number is added to it

(a)   is called the additive identity

4. I know to do these in numbers

• forward counting

• backward counting

• skip counting

• all of these

apply any number operation to get 6 as the answer

7 7 7 =6