Question

What actually happens in Carry over Subtractions ?

Answer 1

@Hero

Answer 2

I am in 12th grade

Answer 3

I am weak in Mathematics Suject.

Answer 4

*subject

Answer 5

I am from India.

Answer 6

@hero lol

Answer 7

You Made Surgeios' life, Please teach me Mathematics and make my life. PLEASE....

Answer 8

Should I take it as partiality being done by you ?

Answer 9

Yes @ParthKohli is from India but he much much student than me as compared to my life's 9th grade.

Answer 10

God Promise : I swear I am weak at mathematics.

Answer 11

I am Sorry for my words @Hero . Please help me in Mathematics.

Answer 12

@ParthKohli is a good student. I want to see him in IITs.

Answer 13

@Hero Sir please help me in this question.

Answer 14

I am really sorry for my words Sir.

Answer 15

No I never wanted a SS. I only want to Study Mathematics and Mathematics and only Mathematics.

Answer 16

I think @goformit100 is just being typical.

Answer 17

@Miracrown Ma'am please understand the feeling of people like us who are weak at mathematics. Please Ma'am.

Answer 18

Can we discuss on the question I posted ?

Answer 19

Here's an example of why carry-over subtraction works.

You can normally subtract \(27 - 13\) using the primitive subtraction method.
This works because you write \(27 - 13\) as \((20 + 7) - (10+3)\) and then \((20 - 10) + (7 - 4)\).

Carry-over subtraction is when you need to do this.What you do is you "carry" the next place value. Why does this work?\[27 - 18\]\[= (20+7) - (10 + 8)\]\[= (20 - 10) + (7 - 8)\]\[= (10 + 10 - 10) + (7 -8)\]\[= (10 - 10) + (10 + 7 - 8)\]\[= 0 + (17 - 8)\]