Learn the new counting unit "thousand" in the second volume of Senior Two, understand the relationship between the counting units of 10, 100 and 1000, and initially develop the concept of bit value. Because the number is large, it is more troublesome to count a thousand directly, and the process of counting is easy to make mistakes, so the learning of thousands is more abstract than the number within 100. So we don't use Arabic numerals.
Arabic numerals, also known as Indian numerals, are composed of counting symbols of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 * * * 10, and are now internationally used numerals. Arabic numerals were first invented by ancient Indians, then spread to Europe by Arabs and modernized by Europeans. They have the characteristics of simple strokes, scientific structure, clear images and short groups, and are used frequently.