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

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Anonymous

∙ 15y 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

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Wiki User

∙ 15y ago
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Continue Learning about Math & Arithmetic

What is the number before 900?

899


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One less than 900 is 899.


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72,000


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37 does not divide evenly into 900 The answer is 900/37 = 24.324


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30 x 30 = 900

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One example is 1 + 899.


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899


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900


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It is: 899+1 = 900


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1-900 = -899


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900


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There are 900 centimeters in 9 meters, as 1 meter is equal to 100 centimeters.


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


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One less than 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 .


What number times itself equals 900?

It is: 30*30 = 900


What times by itself and equals 900?

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