answersLogoWhite

0

Subjects>Math>Math & Arithmetic

If 30 times 30 equals 900 why does 29 times 31 equal 899?

User Avatar

Anonymous

∙ 16y ago
Updated: 9/17/2023

(x-1)*(x+1) = x2 - x + x - 1 = x2 - 1

So, when x = 30,

29*31 = 30*30 - 1

Or, since 30*30 = 900, 29*31 = 900-1 = 899

User Avatar

Wiki User

∙ 16y ago
Copy

What else can I help you with?

Continue Learning about Math & Arithmetic

What is the number after 899?

The number after 899 is 900.


What is the number before 900?

899


What is the number just before 900?

The number just before 900 is 899.


What is one less than 900?

One less than 900 is 899.


What does 900 times 80 equals what?

72,000

Related Questions

What 2 numbers equal 900?

One example is 1 + 899.


What is the number after 899?

The number after 899 is 900.


What is the number before 900?

899


What comes after 899?

900


What is one more than 899?

It is: 899+1 = 900


What is 1-900?

1-900 = -899


What is 899 rounded to the nearest ten?

900


How many many centimeters equal 9 meters?

100 centimeters equals a meter. Multiply 9 times 100. 900 centimeters equals 9 meters.


What number comes after 899?

To get the next number after any number, just add 1.


What is one less than 900?

One less than 900 is 899.


What is the number just before 900?

The number just before 900 is 899.


What is the number when you round 899 to the nearest thousand?

The number is still 899, but it has been rounded to 1,000 .

Trending Questions
How many square feet are in a inch? What is negative five hundred sixty one more than nine thousand three hundred forty seven? What is the least common denominator of 27 and 54? When light of two colour A and B is passerd yhrough a plane boundary. A bent more than B? What percentage of 1 mile is 528 meters? What is 45.3 percent in a decimal form? What is cartograms? How many years in one million months? What is Zstats? What is 32 - 8? How many mm in 4.4 cm? What is Ax plus By equals C with a qraph that is a straight line? How many millimeters in 4.56 meters? Who is most famous for his design of the geodesic dome? What is the median of 0 0 1 2 2 3 3 3 3 3 4 4 4 5 6 9? 23 plus 11 equals 7 131 plus 42 equals 11 28 plus 75 equals? What is 71 over 1000 in simplest form? What are the prime factorizations of 625? What is the mean of the numbers 23 78 45 22? What does moriah mean?

Resources

Leaderboard All Tags Unanswered

Top Categories

Algebra Chemistry Biology World History English Language Arts Psychology Computer Science Economics

Product

Community Guidelines Honor Code Flashcard Maker Study Guides Math Solver FAQ

Company

About Us Contact Us Terms of Service Privacy Policy Disclaimer Cookie Policy IP Issues
Answers Logo
Copyright ©2026 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.