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
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We sent home some unfinished work today, that we just plain ran out of time in doing. Five or six students actually finished theirs in class, but the rest took his or her's home. It was work that connects to our place value goals.
Now, we have ongoing homework that involves our math facts in addition and subtraction- no multiplying yet! We want to attain automaticity in our facts. That means if I ask 19-7, they all can answer 12 in a second or two. Not in 10 or 20 seconds while they count it out in their head or on, yikes, our fingers! Just a reminder that we need those summer pics and forms turned in! 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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