Math Games

Archive for November, 2006

Question: can someone recommend a software program that will help my 10 year old with fractions and decimals?

i'd like something that teaches interactively, adding, subtracting, multiplication, division, reducing, basically to help him remember what he's learned so far in 4th grade, and get a head start on 5th grade. some programs i've used in the past for math aids have a video game theme, where you progress through the game by doing well at the math. something like this would be perfect. thanks for any suggestions you can give.

Answer: MATH, ACTIVITIES and FUN.

http://www.gcse.com/maths/mindex.htm?

http://www.sosmath.com/wwwsites.html

http://www.webmath.com/index.html

http://mathforum.org/dr.math/

http://www.tc.cornell.edu/Services/Education/Gateways/Math_and_Science/mathematics.htm

Kindergarten to 8th Grade Interactive Sites

http://www.theproblemsite.com/math_games.asp

http://www.internet4classrooms.com/skills_4th.htm

Math Fractions : Reducing Fractions

Question: math questions?

1.In a game with two standard six-sided dice, what is the probability that when both dice are rolled you get a 6 on at least on die or that the sum of both dice is 6? express your answer as a common fraction.

2.How many integers have a reciprocal that is greater than 1/50.1 and less than 1/3.14

3.What is the side lenght , in inches , of the largest square that can be inscribed in a circle with a radius of 8 inches? Express your answer in simplest radical form.

Answer: 1. The chance of getting at least one 6 when 2 dice are rolled is 2/6 = 1/3.

The chance that the sum of the dice will be six is determined by how many combinations for the two dice to sum to 6.
1 + 5
5 + 1
4 + 2
2 + 4
3 + 3
3 + 3
There are 6 possible ways to roll a sum of 6 and there are a total of 35 ways to roll the dice. The probability of rolling the dice so that the sum is 6 is a probability of 6/36 = 1/6

2. 50 has a reciprocal greater than 1/50.1 because 1/50 is greater than 1/50.1
4 has a reciprocal less than 1.314 because 1/4 is less than 1/3.14

All integers between and including 4 and 50 satisfy the conditions of having reciprocals greater than 1/50.1 and less than 1/3.14 There are a total of 47 integers that satisfy the conditions.

3. If a circle has radius = 8, then one can inscribe a square inside the circle and the diagonal between two opposite corners of the square will have a length of 8. The diagonal across the square defines two right triangles, each with a hypotenuse = 8 and the angles at the corners of the triangles are each 45 degrees. The length of the sides of the trangle are each 8*sin(45) long. The sides of the triangles are also the sides of the square. Therefore the length of the sides of the square is 8*sin(45) long. Since sin(45) = sqrt(2) / 2, we can write the answer in a radical form.
8 * [sqrt(2) / 2] = 4* sqrt(2)
The length of each side of the square = 4*sqrt(2)

Guy gets maced