Number and Place Value：練習題

Which of the following numbers makes the mathematical statement below true?
\(640,000 + \dots + 500 + 20 + 8 = 647,528\)

Round the number 435,267 to the nearest ten thousand.

What is the smallest 6-digit number that can be formed such that the digit in the thousands place is 8, and each of the digits 0, 1, 3, 5, 8, 9 is used exactly once?

What is the difference between the value of the digit 8 and the value of the digit 2 in the number 1,842,506?

In the number 7,432,109, what is the difference between the value of the digit in the millions place and the value of the digit in the ten thousands place?

What is the place value of the digit 6 in the number 5,640,321?

Arrange the following digits to form the largest possible 6-digit even number: 5, 0, 8, 2, 7, 3.

Find the difference between the largest 6-digit number and the smallest 6-digit number that can be formed using the digits 1, 0, 4, 7, 5, 2 exactly once each.

A charity group collected exactly seven hundred and forty-two thousand, and fifty-six pieces of stationery.
(a) Write the number of pieces of stationery in digits.
(b) What is the value of the digit in the ten thousands place?
(c) If the charity receives another 9,000 pieces, what will the new total be, rounded to the nearest hundred thousand?

Consider the number 4,705,312.
(a) What is the place value of the digit '7'?
(b) Round this number to the nearest ten thousand.
(c) If you increase the digit in the thousands place by 4 and decrease the digit in the millions place by 2, what is the new number?