What is Common Core 32 -12 and how can I solve it?

  • Context: High School 
  • Thread starter Thread starter jacobtwmurphy
  • Start date Start date
  • Tags Tags
    Brain Core
Click For Summary
SUMMARY

The discussion centers on the Common Core method for solving the equation 32 - 12, which results in 20, and the multiplication problem 248 * 38, yielding 9386. The methods highlighted include subtraction by addition and lattice multiplication. The subtraction method involves adding the numbers 3, 5, 10, and 2 to reach 32 from 12, which the user finds unnecessarily complicated compared to traditional methods. The conversation reflects a broader concern regarding the teaching of these methods in schools.

PREREQUISITES
  • Understanding of Common Core mathematics principles
  • Familiarity with lattice multiplication techniques
  • Basic knowledge of subtraction and addition methods
  • Awareness of educational trends in mathematics
NEXT STEPS
  • Research the Common Core standards for mathematics education
  • Explore detailed explanations of lattice multiplication
  • Investigate alternative subtraction methods used in modern curricula
  • Examine the impact of teaching methods on student learning outcomes
USEFUL FOR

Educators, parents, and students interested in understanding contemporary math teaching methods, particularly those related to Common Core standards and their implications for learning.

jacobtwmurphy
Messages
2
Reaction score
0
I am trying very desperately to figure out this specific problem I don't need examples of other problems i need this very very specific problem before i loose my freaking mind. Please someone explain this and show me how it works I am extremely desperate. I am told this is some sort of key, I do not know this is not my math problems or work sheet, just information I was unfortunate enough to stumble on a meme. Absolutely no one can give me a straight answer, I have even asked a math teacher and he had no idea what this was.
 

Attachments

  • 1798627_527606177342422_628279470_n.jpg
    1798627_527606177342422_628279470_n.jpg
    16.3 KB · Views: 672
  • multiplication62.gif
    multiplication62.gif
    13.5 KB · Views: 649
Mathematics news on Phys.org
The first one is 32-12=20.
The second is 248*38=9386.
The methods used are subtraction by addition and lattice multiplication.
The lattice multiplication is sensible, while correct I do not see the reasoning behind the subtraction, that is not how I would do it.
 
the subtraction 'method' looks like hard work to me! Starting with 12, if you add, in succession, the numbers 3,5,10 and 2, you reach a total of 32. Hence the answer to 32-12 is equal to the sum of those numbers - 20. The choice of numbers to add seems somewhat arbitrary, save for the fact that the intermediate totals are round numbers - well, sort of. I'll stick with the traditional method!
 
Thank you guys, I am digging around looking for every spec of information on this, I can't believe this is being taught in schools now.
 

Similar threads

Misc. Attach plates (my design) to the stator core of the machine
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Pure mathematics problem solving and relevance to theoretical physics
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Iron core barely boosting field strength
  • · Replies 43 ·
2
Replies
43
Views
7K
Undergrad Can Angular Velocity Accurately Control Ragdoll Limbs in Game Physics?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad How to create a fair distribution algorithm?
  • · Replies 1 ·
Replies
1
Views
1K
MHB Seeking a specific formula to allow for materials shrinkage
  • · Replies 4 ·
Replies
4
Views
2K
Studying Am I Missing the Right Approach to Studying Math?
  • · Replies 9 ·
Replies
9
Views
2K
Admissions How Can I Improve My Chances of Getting into a PhD Program in Engineering?
  • · Replies 6 ·
Replies
6
Views
3K
What would a design prototype research paper look like?
  • · Replies 8 ·
Replies
8
Views
3K
MHB How Can I Efficiently Cut Wood Boards of Different Lengths?
  • · Replies 4 ·
Replies
4
Views
4K