The ancient Egyptians were already working with fractions. Today, their knowledge helps us do all kinds of things—plan a birthday party, cook, garden—by adding or subtracting fractions. So, let's celebrate!
多媒體：
多媒體
互動練習
版面：
固定
插圖：
許多
關鍵字詞： Mathematics | operations | adding fractions | subtracting fractions | same denominator