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Message
re: Another math problem for the OT to attack
Posted on 9/29/16 at 2:56 pm to brgfather129
Posted on 9/29/16 at 2:56 pm to brgfather129
quote:
It's the doubles +/- 1 technique
4+5
4+4+1
Sounds like an introduction to multiplication.
4+5
becomes
(4x2) + 1
1
Posted on 9/29/16 at 2:57 pm to brgfather129
quote:
Nothing difficult or challenging about that representation....very effective and has been around for decades.
Meh, I've use many common core principles on my own before they were ever taught, so I'm actually for most of it. However, 5+4 doesn't need to be any more complicated than the fact that it equals 9. You're not going to break it into 4+4+1 when it is sandwiched in between 5 other digits on your quarterly income tax payments.
Posted on 9/29/16 at 2:57 pm to Rouge
288
Posted on 9/29/16 at 2:57 pm to PearlJam
quote:
quote: It's the doubles +/- 1 technique 4+5 4+4+1 8+1 This looks right.
I can agree with this as well.
Posted on 9/29/16 at 2:58 pm to Rouge
4+5
4+4+1
8+1=9
So 4+5 = 9
Confused?
4+4+1
8+1=9
So 4+5 = 9
Confused?
Posted on 9/29/16 at 2:58 pm to Scooba
they want kids to have a strong doubles foundation
4+4
5+5
6+6
7+7
8+8
9+9
4+4
5+5
6+6
7+7
8+8
9+9
Posted on 9/29/16 at 2:58 pm to SuperSoakher
quote:
4+5
4 + 2 + 3
6 + 3 = 9
So, 4 + 5 = 9
No, it's clearly
4+5
4+4+1
8+1=9
So, 4+5=9
common core is trying way too hard to make little kids think outside the box. We're trading in proven methods that generate known results in the hopes that our unproven methods will generate new and better results. It's a huge gamble and our children get to pay the piper if it fails.
Posted on 9/29/16 at 3:00 pm to Rouge
1+1+4+2+1=the stupidest fricking way to get to 9 I've ever seen.
Posted on 9/29/16 at 3:02 pm to PrivatePublic
quote:
It's a huge gamble and our children get to pay the piper if it fails.
What makes you think it will fail? The math still works out. It's just not how you learned how to do it. The uproar over the change in teaching methods is getting absurd, and I used to hate on common core hardcore.
Posted on 9/29/16 at 3:02 pm to slackster
quote:
Well done. I actually like most common core principles for math, but this is ridiculous. Proving that 4+5=9 by having you solve 6+3=9 is absurd. You're not breaking down a complex number; it's 4+5 for frick's sake.
I agree in part, but this sets up a firmer foundation for higher math. Rote memorization is the reason the US has trailed behind Asian countries in math for 30 years.
In standard arithmetic everything for the first 8 years of education is based on knowledge of math facts, then in the 9th year equations are introduced. This type of nonsense is changing that.
Posted on 9/29/16 at 3:03 pm to PrivatePublic
quote:
common core is trying way too hard to make parents think outside the box.
FIFY. It isn't outside of the box for little kids when they've never established a box in the first place.
I don't know how the results will turn out, but the backlash is mainly because mom and dad don't understand the concepts, not because they're bad concepts.
Posted on 9/29/16 at 3:04 pm to Rouge
Can't view...
Posted on 9/29/16 at 3:04 pm to slackster
quote:
FIFY. It isn't outside of the box for little kids when they've never established a box in the first place.
I don't know how the results will turn out, but the backlash is mainly because mom and dad don't understand the concepts, not because they're bad concepts.
Yep.
Posted on 9/29/16 at 3:06 pm to LNCHBOX
8+8+1 easy stuff
17-1 oh lawd look out
17-1 oh lawd look out
Posted on 9/29/16 at 3:06 pm to slackster
quote:
because mom and dad don't understand the concepts
Nailed it. Most of these problems aren't even challenging, but I keep seeing complaints (sadly from relatives) along the lines of "that's not how I learned it." Well, if you can't figure something this simple out, maybe that's evidence that the "way you learned it" wasn't all that effective.
Posted on 9/29/16 at 3:06 pm to BlackAdam
quote:
I agree in part, but this sets up a firmer foundation for higher math.
Fair enough. I don't get the obsession with doubles, but I do see the benefit of having kids realize that a number is made up of other numbers. It's the way I've done math forever and it's the reason I was an awful tutor in high school - I handled math in a way that was Greek to my classmates.
Posted on 9/29/16 at 3:08 pm to slackster
quote:It is the way most people who do math well, do it. Typically it is done quickly and subconsciously.
It's the way I've done math forever
Posted on 9/29/16 at 3:09 pm to DisplacedBuckeye
quote:
Well, if you can't figure something this simple out, maybe that's evidence that the "way you learned it" wasn't all that effective.
Maybe so, but I do sympathize with parents in this predicament. They want to be involved with their kids and want to help with homework and whatnot, and if you didn't sit through the lesson that day, that problem could easily become 4+2+3, 6+3=9, so 5+4=9. That is mathematically correct and fits the guidelines of the arrows, but parents aren't going to jump to the fact that they're focusing on "doubles" and they're looking for 4+4+1 in the end.
It is a better approach overall though, at least IMO.
Posted on 9/29/16 at 3:10 pm to Chad504boy
quote:
17-1 oh lawd look out
Posted on 9/29/16 at 3:11 pm to slackster
quote:It is really because the work sheets sent home don't explain the concepts and mom and dad aren't informed what is happening in the class room. Thus, mom and dad don't get it because they have never been shown it and mom and dad get frustrated because they can't help Sue with first grade math.
backlash is mainly because mom and dad don't understand the concepts, not because they're bad concepts.
For example, if the op's worksheet had a simple example and explained the concept being taught, op would get it and so would everyone else.
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