Finding The Number of Digits (Tìm số chữ số)

Presentation

•

Mathematics

•

2nd - 5th Grade

•

Medium

Cuong Tran

Used 8+ times

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6 Slides • 10 Questions

Finding The Number of Digits

Tìm số chữ số

The Opening Problem

How many digits are used for the page numbers in a book that has 150 pages?
A book uses 312 digits altogether for its page numbers. How many page does the book have?

Example 1

How many digits are there from numbers 1 to 80?

Formula

$Number\ of\ Digits\ of\ n-digits\ group=\ n\times Number\ of\ Terms$

Multiple Choice

How many digits are there from numbers 1 to 60?

106

108

110

111

Multiple Choice

How many digits are there from numbers 1 to 120?

250

252

254

256

Multiple Choice

How many digits are there in a book that has 456 pages?

1260

1262

1264

1266

Fill in the Blanks

How many digits are there from numbers 1 to 666?

Type answer...

Fill in the Blanks

There are 2000 pages in a storybook. How many digits are used to print the page numbers of the book?

Type answer...

Fill in the Blanks

How many times does the digit "2" appear in the numbers 1 to 222?

Type answer...

Example 2

A book uses 342 digits altogether for its page numbers. How many page does the book have?

Multiple Choice

71 digits are used to print the page numbers of a book. What is the last page number of the book?

Multiple Choice

222 digits are used to print the page numbers of a book. How many pages does the book have?

100

110

120

Fill in the Blanks

432 digits are used to print the page numbers of a book. How many pages does the book have?

Type answer...

Fill in the Blanks

2953 digits are used to print the page numbers of a dictionary. How many pages has the dictionary?

Type answer...

THANK YOU!

Finding The Number of Digits

Tìm số chữ số

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