四年级数学上人教版电子课本（四年级英语上册软件）
In this article， we will explore the content of the fourth-grade mathematics textbook from People‘s Education Press and the software for the fourth-grade English textbook。 We will provide answers and explanations to the exercises in the textbook。 Let‘s dive into the world of numbers and language learning！
Exercise 1：
Question： What is the place value of the digit 5 in the number 6，759？
Answer： The place value of the digit 5 in the number 6，759 is 50。
Exercise 2：
Question： Calculate 456 + 273。
Answer： 456 + 273 = 729。
Exercise 3：
Question： Write the fraction for three-fourths。
Answer： The fraction for three-fourths is 3/4。
Exercise 4：
Question： Rearrange the following numbers from smallest to largest： 1。76， 1。67， 1。89， 1。53。
Answer： 1。53， 1。67， 1。76， 1。89。
Exercise 5：
Question： Find the perimeter of a rectangle with length 8 cm and width 5 cm。
Answer： The perimeter of the rectangle is 26 cm （8 + 8 + 5 + 5）。
Through these exercises， students can enhance their understanding of mathematics concepts such as place value， addition， fractions， and ordering numbers。 The textbook provides a comprehensive learning experience for fourth-grade students to build a strong foundation in mathematics。
In the software for the fourth-grade English textbook， students can practice their language skills through interactive activities and games。 The software covers topics such as vocabulary， grammar， reading comprehension， and listening exercises。 By using the software， students can improve their English language proficiency in a fun and engaging way。
Overall， the fourth-grade mathematics textbook and the software for the fourth-grade English textbook offer valuable resources for students to develop their skills in both math and language learning。 By completing the exercises and activities in the textbook and software， students can strengthen their academic abilities and achieve success in their studies。 Let‘s continue to explore the world of knowledge and learning， one lesson at a time。
