Here’s the thing, we all already do this kind of math each and every day. Knowing how to do this is quite useful.
Let’s make the problem a bit more likely, though.
I go to the hardware store to buy something that is $12. I have a $10 and a $20 bill, so I give the person at the checkout counter $30. This person now has to make change.
The teller grabs 3 $1 bills and puts them on the counter, and says, “12 + 3 is 15”.
The teller then grabs a $5 bill and puts it on the counter, and says, “and 5 makes 20.”
The teller then grabs a $10 bill and puts it on the counter, and says, “and 10 makes 30.”
The item is $12. I put down $30. The teller counted out $3 + $5 + $10, or $18 in change. WHICH IS THE CORRECT ANSWER. This is a real life example of what happens in hardware stores across the country each and every day.
Just because you do not understand what is being taught does not mean that what is being taught is useless, confusing, or pointless. I am NOT defending common core. What I am defending is teaching children how to do the same kind of real-world practical math that we do every day.
The cashier gives back my $10, which was superfluous, and after punching my $20 into the register, tehy give me back another $8 in change—because that's what the machine tells them to do.
The US would never have gone to the moon with common core math - it takes too long. An abacus is quicker.
If you give me a $10 and a $20 for a $12 item, I’ll give you back the $10 and figure it out from there.
Common Core is nonsense. Kids and people need problem solving skills. They also need basic math skills.
>>I go to the hardware store to buy something that is $12. I have a $10 and a $20 bill, so I give the person at the checkout counter $30. This person now has to make change.<<
If it costs $12, just give the teller the $20 bill, take your $8 change and go home with your brain not fried.
That’s fine if you have to give change, but if you just want to know what “32 minus 12” in, it’s hardly practical.
Are they training kids to grow up to become cashiers? Maybe preparing them for a career at Walmart or McDonalds?
I have a $10 and a $20 bill, so I give the person at the checkout counter $30
Why give $ 30 when you could give $ 20 ?
Why would you give the person an extra $10? The $20 bill will cover it.
The bottom line is that the cashier will simply give out whatever change the register tells them to give, which brings me to the frustration I experience. People coming out of our education system today are being taught not to think. So when I go to the store to make a $18for the change, the cashier has already keyed into the register the $20 and hit 'total' which tells the cashier I am due $1.17 in change. I then say, "Hold on, I have change" as I hand the cashier 8¢. The cashier then stares at the 8¢ with a befuddled look. After a pause, the cashier takes the change in her hand, and then reaches into the register to retrieve a dollar bill, a dime, a nickel, and two more pennies. So instead of handing me back a dollar bill and a quarter, I get a handful of change and a cashier who has no idea why I handed him/her 8¢.
Thanks.
I’ve been scratching my head over something that happened at Wal Mart last week.
My bill came to $11.38, I gave the girl a $10 and 2 $1’s.
She handed me my receipt and no change.
She couldn’t even enter the correct amount I gave her into her register and let the register figure out how much change was due.
She had no concept of how to count change.
I had to tell her she owed me $.62.
>> “This is a real life example of what happens in hardware stores across the country each and every day.” <<
.
Only where the buyer is so stupid that he doesn’t know that 20 is more than 12, and the clerk is in the same shape.
You’d make a great deceptive screwel teechur.
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