Understanding math means understanding number relationships. HOW NUMBERS WORK stresses the following four concepts: 1: the meaning of =; 2: counting spaces on the number line [needed to understand negative numbers and coordinate grid]; 3: part-whole thinking; 4: properties of 1 [needed to understand equivalent fractions] This book is aimed at Adult Basic Education/high school equivalency students and is also appropriate for grades 9-12 General Math...