Keep mathematically fit, for PNG high schools :  answer for grade 9 / 
Curriculum Unit, Dept. of Education. 
 - [Port Moresbt] :  Dept. of Education,  1982. 
 - 38 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Secondary)--Papua New Guinea.