Subtracting Across Zeros & Adding and Subtracting Decimals

Wednesday, September 18, 2013
Students learned how to subtract in situations involving zeros. They had to go all the way to their "neighbor" that had a value to borrow. We watched the following video to help students understand subtracting across zeros:

 

Students need to be careful when borrowing (regrouping). I have noticed that sometimes students borrow from the thousands or hundreds and give it to the ones place. Students forget to go place value by place value to give and borrow.

 

 

Thursday, September 19, 2013

Students learned how to add and subtract decimals using models and by lining up the decimal points.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Students also wrote addition and subtraction clue words in their math journals.

 

 

 

All grades are updated on the grade book/database. I have uploaded Friday's test scores on the grade book as well. Please have a look.

 

Adding and Subtracting Whole Numbers

Monday and Tuesday, September 16 & 17, 2013
On Monday students learned how to add with regrouping (carrying). This really should have been a review of addition and subtraction because they learned these concepts last year.
Here are 2 very helpful videos for addition that we watched in class:

 

 

 

On Tuesday students learned how to subtract whole numbers including problems with regrouping (borrowing). We learned a rhyme that helps us remember when to borrow.

More on top, no need to stop.

More on the floor, go next door!

What that means is if the digit on top is bigger then subtract normally. If the digit on the bottom is bigger then go next door and borrow some more. Please practice subtraction with borrowing at home! Some students need extra help with this concept.

 

Here are 2 very helpful videos for subtraction:                                                                     



 

 

Reminders: Progress reports will be printed and sent out at the end of the week. Students your first major assessment/test will be on Friday, September 20, 2013. The test will consist of 20 to 25 questions and will include the following concepts:

• Place value
• Comparing and Ordering Numbers
• Rounding
• Decimals
• Adding
• Subtracting

 

Congratulations to my first batch of Star Students:

4A - Anna

4B - Ashley

4C - Genaro

Every 2 weeks I will pick one student from each section as Star Student. I pick students based on their performance in class and behavior. The next star student could be YOU! :)