Today we reviewed how to subtract 3-digit and 4-digit numbers. Normally, we just borrow from the place value position to the left. However, today there was a zero and we couldn't borrow!
Here is a video showing one strategy for subtracting when the neighbor is a zero.
How did it work for you?
Did you find any problems where there were TWO zeros?
What did you do?
Thank you so much for posting such a clear and thoughtful video tutorial. Adam and I just watched it and found it very helpful. I had never heard of the squaring off technique, but it certainly makes it easier to borrow when you have more than one zero. We even tried it when subtracting from a number like 5000, and it works just as well. The only difference is that you need to put a box around the "500" and then borrow from that making it "499".
ReplyDelete-Adam's Dad
Mrs. Yollis and class,
ReplyDeleteI teach 3rd grade too! I loved your video on subtracting with a middle zero. I will be teaching this next week in my class. I loved your squaring off strategy. I have never seen that one before! Great job Nick on your example problem!
Mrs. G
Dear Mrs. Yollis,
ReplyDeleteI miss you so much! I'm in 7th grade now, and I'm glad you taught me so well. Your the best 3rd grade teacher ever! I hope you and your new class enjoy the rest of the year.
From your former student,
Moraiya Pourfarid
P.S. I miss Panda too! :)
@ Moraiya,
DeleteHow nice to hear from you! I miss you too!
I am happy to hear that you think I taught you very well. That makes me smile!
I know what a dog lover you are. If you go to our 365 blog and search using the word "Buck", you will see my one-and-a-half year old dog! I love him so!
Your proud former teacher,
Mrs. Y♥llis
P.S. Remember, never use your last name on the Internet. We always want to limit personal information! :-)