YEAR 4/ UNIT 1 WHOLE NUMBERS- ADDITION WITHIN 100 000

KEY NOTES

  6 548  }addens
+ 1 290  }
  7 838  } sum

• Addition is a commutative operation.

    e.g:Any whole numbers a and b
        a + b = b + a

• Addition is an associative operation.

   e.g:Any whole numbers a, b and c.
       ( a + b ) + c = a + ( b + c )