[原版教材]小学4，5，6年级原版英文数学书 Progress in Mathematics

Progress in Mathematics is designed to meet the individual needs of all learners.

In Grade 4, multiplication and division will be further developed, and your fourth grader will apply both operations throughout the grade-level, as he or she studies the concepts of measurement, probability and statistics, fractions, geometry, perimeter, area, volume, and decimals.

In Grade 5, the concepts of fractions and decimals will be further developed, and your fifth grader will use all four operations with these number types. There will also be an increased emphasis on algebraic thinking. Other topics that are studied include: statistics, geometry, measurement, probability, percents, and proportions.

In Grade 6, the concepts of integers and rational numbers will be further developed as well as ratios, percents, and coordinate geometry. There will be an increased emphasis on algebraic thinking. Other topics that are studied include: data and statistics, probability, geometry, measurement, and proportions.