Oh also how do you tell if two fractions are proportional? I would really appreciate it. Thanks I forgot my notes
2006-11-01 10:54:21 · 4 answers · asked by monkeyshopper 2 in Education & Reference ➔ Homework Help
A rational number is a number that can be expressed as a ratio of two integers. Numbers that go on forever can be rational numbers, for example, 1/3. Pi is an irrational number because it cannot be expressed as the ratio of two integers, NOT because it goes on forever.
2006-11-01 11:05:02 · answer #1 · answered by Pat S 1 · 0⤊ 0⤋
rational numbers can be written as a ratio (fraction)
irrational cannot...basically if you see a sqrt of a number that is not a perfect square it is irrational and also pi is irrational
any nonterminating (non ending) and non repeating number is irrational also. Numbers like .3 repeating are rational
To tell is two frations are proportional check the cross products.
for example 1/2 = 3/6 because 1*6 = 2*3...multiply the bottom of one times the top of the other...
1/2 is not in proprotion to 2/3 because 1*3 does not equal 2*2
2006-11-01 19:08:34 · answer #2 · answered by dla68 4 · 0⤊ 0⤋
two fractions are proportional if you can reduce them to the same number
example
2/6 and 1/3
2/6 reduces to 1/3, so they are proportional
usuually irrationals are decimals that go on forever, like pi
ratioonal do not, and can be numbers like 1 or 1.5
2006-11-01 18:57:35 · answer #3 · answered by Anonymous · 0⤊ 0⤋
A number is rational if it can be expressed exactly by some fraction.
pro·por·tion·al (pr-pôrsh-nl, -pr-) KEY
ADJECTIVE:
Mathematics Having the same or a constant ratio.
a/b and c/d are proportional if
(a/b)/(c/d) = k, k being a constant.
2006-11-01 19:14:40 · answer #4 · answered by Helmut 7 · 0⤊ 0⤋