Math confusion

Watch this thread
Pinkturtle_1992
Badges: 5
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 1 month ago
#1
When simplifying expressions , could u simplify a+a+a+a to 4a and a^4 ?
0
reply
gdunne42
Badges: 21
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 1 month ago
#2
(Original post by Pinkturtle_1992)
When simplifying expressions , could u simplify a+a+a+a to 4a and a^4 ?
No a^4 = a x a x a x a
2
reply
username5318474
Badges: 12
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report 1 month ago
#3
a + a + a = 3a
just like an orange + orange + orange = 3 oranges.

a x a x a = a^3
so y^2 = y x y

Understood?
1
reply
Pinkturtle_1992
Badges: 5
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#4
Report Thread starter 1 month ago
#4
(Original post by gdunne42)
No a^4 = a x a x a x a
Thank u 🙏
0
reply
Muttley79
Badges: 20
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#5
Report 1 month ago
#5
Fruit salad is not algebra - how do oranges explain a x a = a^2
(Original post by speed_bird)
a + a + a = 3a
just like an orange + orange + orange = 3 oranges.

a x a x a = a^3
so y^2 = y x y

Understood?
0
reply
Kallisto
Badges: 22
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#6
Report 1 month ago
#6
(Original post by Pinkturtle_1992)
When simplifying expressions , could u simplify a+a+a+a to 4a and a^4 ?
a^4 means that the variable a is multiplied for times with itself, while 4a means the variable a is added four times with itself.

This is a fine difference!
0
reply
rebelw
Badges: 12
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#7
Report 1 month ago
#7
just be smarter
0
reply
aliya_sc
Badges: 0
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#8
Report 1 month ago
#8
(Original post by Muttley79)
Fruit salad is not algebra - how do oranges explain a x a = a^2
fruit salad is not algebra, well done! that's some incredible deduction there!

On a serious note, analogies do not have to work for every situation. The analogy was dropped when they moved on to a x a..., but it worked for the addition : )
1
reply
Muttley79
Badges: 20
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#9
Report 1 month ago
#9
Yes but it's the very thing that teachers are told not to use - analogies do have to work in maths or they are useless.
(Original post by aliya_sc)
fruit salad is not algebra, well done! that's some incredible deduction there!

On a serious note, analogies do not have to work for every situation. The analogy was dropped when they moved on to a x a..., but it worked for the addition : )
Last edited by Muttley79; 1 month ago
0
reply
username5318474
Badges: 12
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#10
Report 1 month ago
#10
(Original post by aliya_sc)
fruit salad is not algebra, well done! that's some incredible deduction there!

On a serious note, analogies do not have to work for every situation. The analogy was dropped when they moved on to a x a..., but it worked for the addition : )
Perfect! Thanks aliya_sc.
I think the analogy with oranges captures the concept quite well. I don't think it has simplified or neglected any aspect of addition here. As aliya_sc mentioned, analogies do not have to work for every situation and thats why I didn't use any to simplify a^4.
(Original post by Muttley79)
Yes but it's the very thing that teachers are told not to use - analogies do have to work in maths or they are useless.
0
reply
Muttley79
Badges: 20
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#11
Report 1 month ago
#11
(Original post by speed_bird)
Perfect! Thanks aliya_sc.
I think the analogy with oranges captures the concept quite well. I don't think it has simplified or neglected any aspect of addition here. As aliya_sc mentioned, analogies do not have to work for every situation and thats why I didn't use any to simplify a^4.
It is not pedagogically sound so should not be encouraged ...
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest

Does school Maths prepare people well enough for the future?

Yes, it gives everyone a good foundation for any future path (40)
32.79%
Somewhat, if your future involves maths/STEM (55)
45.08%
No, it doesn't teach enough practical life skills (26)
21.31%
Something else (tell us in the thread) (1)
0.82%

Watched Threads

View All