©2009 G Dear – Not to be sold/Free to use Stage 4 Years 7 & 8 Directed Numbers Introduction Press Ctrl-A ©2009 G Dear – Not to be sold/Free to use

and the Positive Numbers make up the . . . Introduction Directed numbers have both size and direction. Eg. Negative Numbers Positive Numbers -5, -4, -3, -2, -1, 0, +1 , +2 , +3 , +4 , +5 , … Zero Together, the Negative Numbers, Zero, and the Positive Numbers make up the . . . Integers

- - - - + + Correct Wrong + + Introduction Examples of Directed Numbers: - Going up 10 steps. + Going 50 km west. - + Correct Wrong Going down 5 floors. - + Going 125 km east - + V

- - - - + + Correct Wrong + + Introduction Examples of Directed Numbers: - Gaining 50 kg + 12oC fall in temperature. - + Correct Wrong Withdraw $5 from Bank. - + Finding 3 apples. - + V

Introduction Examples of Directed Numbers: +3 – 5 = –2 +4 -5 +3 -1 + 4 = +3 b +4 +2 -3 1 +2 – 3 = -1 c -2 -1 -1 -2 + 4 = +2 d -2