I feel like we just fell off the nearest cliff! We jumped into place value headfirst, but had a few set backs when we tried to segue into expanded notation. So, I am starting off with a quick video review for that! Yes, it says 4th grade, don't let that freak you out! Now, on to adding and subtracting across zero. Why both? Because they are two sides of the same problem. You have to understand that is how numbers work together! So, last year, our 2nd graders learned "more on the floor, go next door", which is just one strategy. The only problem with this, is that they really don't know what to do when there are 0s in the problem and that's why we go back to manipulatives for this. Basically, we have to understand that 100 is 10 groups of 10s, and we can change one of those 10s into 10 ones. It will take some practice, and we will move to pictures. Some students may stay in the picture form all year! Do not despair, development takes time!
Thanks, Mrs. Froehling
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Remember these guys? Yes, the old 'comparing' symbols! Well, this week we are going to be working on comparing, but not just greater than, less than, or equal to! We are going to be comparing numbers up to 100,000 and we use them in many different ways. Open number lines. This is about being able to find number values on an empty number line and place them in correct areas. The number can be in standard form, expanded form, word form, Comparing whole numbers is going to get us ready for comparing numbers in other ways, such as comparing fractions and comparing decimals. (Please don't freak out about that, it is a ways down the road!)
The tricky part about this for us 3rd graders is that we can see a number in so many ways. And we need to be able to see it in as many ways possible in order to understand it. Example: 2,378 can be 8 ones, 3 hundreds, 7 tens and 2 thousands. It can also be 70+300+8+2,000. And how about 2x1000 + 8x1+ 3x100+7x10? And then the really tricky one: two thousand, three hundred, seventy eight. One of the problems many students have is carefully reading the number words. They tend to skip around, or guess at a number, only to find it was a digit off. We will be working hard on mastering this skill. Games and links to help: http://www.softschools.com/math/place_value/teaching_place_value/ http://www.softschools.com/math/ordering_numbers/ https://www.ixl.com/math/grade-3/convert-from-expanded-form https://www.ixl.com/math/grade-4/convert-between-place-values https://www.ixl.com/math/grade-3/which-number-is-greatest-least addition fact practice: http://www.softschools.com/math/games/fun/math_lines/add_up_to_9/ And for a bigger challenge: http://www.mathplayground.com/PartPartWhole.html Remember, our goal for addition and subtraction is "Automaticity!" Automaticity is the point at which something is automatic. When referring to memorization of the math facts, automaticity means that the student can recall a math fact without having to think about it! It will be a great week! Thanks, Mrs. Froehling Armed with our masks and scalpels (popsicle sticks) we tackled Place Value in many different ways, today! Expanded form, check! Expanded notation, check! Ones, tens, hundreds, thousands, ten thousands, hundred thousands! (Ask your student to sing the song!)
Your student should have brought home their number cards; they planned to try to trick you with their knowledge! Oh, no, I just realized I have been writing in all exclamation points. I do that when I am really excited about our learning! Don't forget, Thursday folder went home today, as well as conduct sheets. Both need a parent signature or initial. Please return tomorrow. Thanks! Mrs. Froehling First off, we don't go to a million. We only learn Place Value to 100,000. That being said, it is still a shock to some kids when we start learning bigger numbers. The craziest part is that we need to learn it so many ways!
1. Expanded form- see the chart? 2. Standard form or Ordinal form- see the chart! 3. Base 100 form- a little more challenging... 4. Word form- self explanatory, but don't forget, NO AND! 5. Expanded notation- not on the chart. Expanded notation looks like this: 3x1,000 + 5x100+ 2x10+ 9x1 Got it? We also have to compare those big numbers and find them on an open number line. What is an open number line? It's one without a beginning or end. It might not even have any numbers on it at all! This is just a little info- and soon I will try to put up a video that shows a little bit of what we are doing! Questions? Please contact me! Just a reminder- send those forms back! We need them by Friday! Thanks! Mrs. Froehling |
AuthorHi, I'm Cheri Froehling, one of the learners in our class! I am also known as the Teacher, but in our class, all of us are learners AND teachers. We are rocking 3rd Grade! Archives
April 2017
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