Most Content Use, interpret, and compare numbers in several equivalent forms such as integers, fractions, decimals, and percents. The text places an emphasis on comparing and interpreting numbers. Integers are covered mainly in grade 6, and negative integers and exponents are explored in grade 8. The material defines and gives examples of the various forms of numbers and their equivalents. Lessons focus on converting fractions to decimals or fractions to percents, or vice versa, and improper fractions to mixed numbers.
Shapes can match exactly or have the same shape in different sizes.
The rigid property of triangles and the boundary and area of circles are not mentioned. Other special properties of circles are covered as well as the classifications of triangles, quadrilaterals, and other polygons. The text defines congruence and similarity. Specific corresponding parts of figures and the rules for congruent and similar triangles are covered in grades 6 and 7. Most Content Calculate the circumferences and areas of rectangles, triangles, and circles, and the volumes of rectangular solids.