Estimating Products

Monday, October 7, 2013
Students learned how to use rounding to estimate products.
A few things students must remember:
-You must round first before you do any calculations.
-You must round the number that is not the single digit number.
-You must round to the greatest place value.

EX: 7 x 234 = ---> 234 rounded to the nearest hundred is 200 so we re-write the problem as 7 x 200 = ---> then we multiply 7 times 2 which is 14 then add 2 zeros. The estimated product is 1,400.

Here is a helpful video (full screen to make bigger):

 

 

Reminders: Tomorrow, Thursday October 10th, is Curriculum Night for K-5. There will be different sessions if you plan on attending, here is an overview and schedule of the sessions:

Room 148: Third, Fourth, Fifth Grade Mathematics Curriculum. Presented by Ms. Kominczak, Mrs. Cao, and Mrs. Gayer. Discussion of math curriculum and STAAR Math testing. View EnVision/Pearson website and receive log-in information. Discussion of ways parents can help students at home (STAAR practice, etc.).

Session Times: 5:10 pm; 5:30 pm; 5:50 pm; 6:10 pm

Estimating Sums and Differences of Whole Numbers and Decimals

Thursday and Friday, September 12 & 13, 2013
Students learned how to estimate sums and differences of whole numbers and decimals. Here is a quick and helpful video that concludes what we learned in class.

Remember Monday HW is due Wednesday. Wednesday's HW is due Friday. Friday's HW is due on Monday. Here is a copy of Friday's Homework (note that HW is not posted on the database because there is an error with my webshare folder). There are 2 pages: Reteaching 2-3 and Reteaching 2-4 (click to download).

Remember to round each whole number then add or subtract. Round decimals to the nearest ones place then add or subtract. If students wish to show work on a scratch sheet of paper they may do so and attach it to the homework.

More Rounding & Homework

Wednesday, September 11, 2013
Students continued to practice rounding whole numbers and decimals. Remember the steps for rounding! Remember the rounding rules: 4 or less, let it rest (stays the same)... 5 or more let it soar (add 1 more)!

Here is a decimals place value chart in case students need it.

 

4C students did not get to see me in math class today due to MAP testing, so we will check Monday's homework tomorrow.

 

All students received a copy of today's homework. Wednesday's homework (click to download) will be due on Friday.

 

Parents, please have your child practice place value and rounding at home! Here's a great Place Value Mat (click to download) to practice with.

Rounding and Estimating Whole Numbers and Decimals

Monday, September 9, 2013
Today students learned how to use rounding to estimate numbers. We learned how to use the Rounding Hill (click to download) to help us round numbers.

Steps for Rounding Hill:
1. Put the number you are rounding to in the box in the middle. Let's say we are rounding 684 to the nearest ten. That would go in the box in the middle.
2. Then we put the two nearest ten in the boxes to the right and left. In this case we would put 680 and 690 (see picture).
3. Underline the place value you are rounding. Look to your neighbor to the right and circle it.
4. If the neighbor to the right is 1-4, you fall back to 680. If the neighbor to the right is 5-9 then you go forward to 690.

 
 

We also went over our vocabulary (click to download) for Rounding and Estimating.


Tuesday, September 10, 2013
Today we continued talking about rounding. We created a class anchor chart for rounding numbers that students will receive and glue into their journals tomorrow.

We discussed rounding decimals. We said that rounding decimals is just like rounding whole numbers... you still follow the same steps!


Reminders: Monday's homework (click to download) is due tomorrow! Also it's picture day tomorrow!!! This time picture day dress code is school uniforms. In the spring students will have free dress pictures taken.

Also, if you can please work with your child on rounding at home that would be great! Give them a few practice numbers to round.