Subtraction-fest 02 ~ Carry Method (Easy)

[@MrVoayer]

"Carry Method" is the method I was thought at school. But now that you have explained "Borrow Method" in your previous video this method somehow appears cumbersome.

[@CrystalClearMaths]

+MrVoayer I still like this method. The advantage that it has is that the pattern is the same regardless of the existence of zeros in the minuend (top number). Actually, I find many of these methods to be enjoyable to use and switch between them ... just for variety :-) I guess it is a bit like having a variety of tools that can be used on a job and feeling the freedom to use them interchangeably, even though one or two of them might be better designed for the particular job at hand.

[@Keda4keda]

thank you so much. i really needed this

[@CrystalClearMaths]

I am glad that it helped, hl. Thank you.

[@ZaC6]

Thankyou so much, this is so much easier than all this carrying 😀

[@CrystalClearMaths]

You are welcome, ZaC. I'm glad that the video was of use to you 🙂.

[@giorgiocosentino509]

With our Common Core math, this method should be included, but it isn't. The idea of Common Core, is to expose the student to the many ways of viewing a problem, so this carrying should be more "common" now, not less. Instead, I see teachers interchangeably using the term "carrying" and "borrowing" for borrowing only. Or sometimes, they say carrying is reserved for addition problems. Thank you for sharing this!

[@CrystalClearMaths]

You are welcome, Giorgio. I am not trained as a primary school teacher, so I am concerned that I may not use some of the 'modern' terminology for these foundational skills/operations. Nevertheless, I felt that it was worth my sharing a few algorithms that people could consider. I am glad that you found this helpful and worth commenting on.

[@ronicallmen]

How to do 900-7

[@CrystalClearMaths]

In the units column, we cannot subtract 7 from 0. We add ten to the units column in the top number (forming a 10 in the units column), and add ten to the lower number by placing a 1 in the tens column. In the units column, we now subtract 7 from 10 to obtain the answer 3. In the tens column, we now have 0 minus 1. We perform the same manoeuvre to obtain 10 minus 1, resulting in 9 for the tens column. The hundreds column now contains the subtraction 9 minus 1 which results in an 8. The final answer is 893.

[@pompompurin150]

I FUCKING LOVE YOU THANK YOU SO MUCH CRYSTAL CLEAR MATHS

[@CrystalClearMaths]

You are so welcome, pompompurin. I am glad that I have been able to make a difference for you (and really appreciate your support and your taking the time to let me know!). Warm regards to you from Australia (Sorry for the delay in replying ... I am a bit preoccupied with life in general atm.)