5-digit numbers (Basic Concepts)：練習問題

What is the total value of the digit \( 9 \) in the number \( 79,214 \)?

What is the smallest 5-digit even number that can be formed using the digits 3, 0, 8, 2, and 7 exactly once each?

Find the sum of the place values of the digit \( 3 \) and the digit \( 5 \) in the number \( 38\,512 \).

Which of the following is the largest 5-digit odd number?

How many even numbers are there between \( 24,997 \) and \( 25,003 \)?

In the number \( 58\,042 \), what is the value of the digit in the ten thousands place?

In the number \( 55\,400 \), how many times is the value of the digit 5 in the ten thousands place larger than the value of the digit 5 in the thousands place?

Starting from \( 31\,500 \), if you count backwards in groups of 500, what is the fourth number in the sequence (including the starting number)?

A library has thirty-seven thousand and fifty-two books in its collection.

(a) Write this number in numerals.
(b) Which digit is in the hundreds place?
(c) What is the value of the digit 7 in this number?
(d) Round this number to the nearest ten thousands.

Use the number cards 0, 1, 3, 5, 8 to form 5-digit numbers using each card exactly once.

a) What is the largest 5-digit even number that can be formed?
b) What is the smallest 5-digit odd number that can be formed?
c) Arrange the numbers formed in part (a) and part (b), along with the number \( 53\,801 \), in ascending order (from the smallest to the largest).