Improving skill in finding the missing number in an equation through cross-number puzzler among grade 4 pupils of KAsibu Central School 
Alona Joyce Alfonso... [et.al] 
 - x, 52 leaves   col. ill  28 cm 
<br/><br/> Undergraduate Thesis (BEED) - Nueva Vizcaya State University 
<br/><br/>Includes appendices & bibliography 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cross-number puzzle<br/>Equation<br/>Mathematics skill