Math Is Fun Forum
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °
You are not logged in.
- Topics: Active | Unanswered
Pages: 1
#1 2024-04-28 06:46:39
- mathxyz
- Banned
- From: Brooklyn, NY
- Registered: 2024-02-24
- Posts: 1,053
Properties of Real Numbers...Part 3
Commutative Properties
a + b = b + a
a • b = b • a
Why does this property not apply to subtraction and division?
Associative Properties
a + (b + c) = (a + b) + c = a + b + c
a (b • c) = (a • b) c = a • b • c
Why does this property not work for subtraction and division?
Offline
#2 2024-04-28 19:44:00
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,456
Re: Properties of Real Numbers...Part 3
Just come up with counter examples.
eg. 5 - 3 ≠ 3 - 5
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
Offline
#3 2024-04-29 06:46:20
- mathxyz
- Banned
- From: Brooklyn, NY
- Registered: 2024-02-24
- Posts: 1,053
Re: Properties of Real Numbers...Part 3
Bob wrote:
Just come up with counter examples.
eg. 5 - 3 ≠ 3 - 5
Bob
If y > x, then y - x does not equal x - y.
Offline
Pages: 1