Math for Kids

Recent Answers

2009-11-21 Basic Math - Weighted Average:

Hi Dennis, There are many ways to compute the weighted average. Basically, the only mathematical requirement is that the weights all add up to one. I can say that the equation you gave is proper, since

2009-11-21 Word Problems - Percentages:

Taje $x abd invest it at 2%. That leaves $(3000-x) to be invested at 5%. The equation to solve is $x(2%) + $(3000-x)(5%) = $(3000)(4%). This mulitplies out to 0.02x + 150 - 0.05x = 120. Combine

2009-11-20 Basic Math - cube:

The only way I know is with a lot of pencil work. You just whittle it down. 10^3 is 1000 so you know it's more than that. 20^3 is 8000, so you know it's between 10 and 20 and it's a little closer to

2009-11-20 Word Problems - maths problem:

Let me see if I understand the problem. A bicycle dealer allows 10% discount on his bicycles. He still makes a profit of 20% on each bicycle. If the total profit he makes is 150, what is the list

2009-11-20 Word Problems - Math:

Since the numbers go from 000000 (which is 0) to 999999, which is 999,999, that looks like a million numbers to me with the first 100,000 that have leading 0's. The list would start like 000,001 000