Good Morning web2.0calc users

My quesdion is dat what is 42+12 and 98-54 ? Im only 7 and i dunt know the answr

42+12 and 98-54 well here young fellow let's try this together okay? For 42+12 an easy way to do this is what is 4+1= and 2+2= then you put them together but with the 4+1 first.
Now the same with 98-54! What is 9-5? and 8-4? There's your answer ! Now do the work and I want to see your answer when you're done !

4+1 =5 and 2+2=4 so 54? and 9-5=3 and 8-4=4 so 34?

4+1 =5 and 2+2=4 so 54? and 9-5=3 and 8-4=4 so 34?

Hi Lily,
42+12 does equal 54, you are correct

However, 98-54 does not equal 34 because 9-5 is not 3.
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I'd like to talk a little more about adding 2 digit numbers.
At school you probably line up 42 and 12 underneath each other so the 12 is exactly under the 42.
The 2 is under the 2 you add them and you get 4
The 1 is under the 4 you add them and you get 5
The answer is 54

But what about 58+14?
8+4=12
5+1=6
But the answer is not 612, that would be too big!
If you were doing it the school method you would do
8+4=12
put down the 2 and carry the 1
then 5+1+ 1 = 7
so 58+14 = 72

If you were doing this in your head,
you might say
58= 50+ 8
14= 10+ 4

50+10=60 (That is 5+1 with a zero after it)
8+4=12

60+12 => 60+10+2 => 72

Why don't you try to do 38+15 ?
I would love to see you answer it and I know the professor would too!

38
15
56? thank you melody and sorry teachr for getting the wong answr

Lily:

38
15
56? thank you melody and sorry teachr for getting the wong answr

Hi Lily,
I think that you have the right idea except that 8+5 does not equal 16.
Could you fix it up for me please.
Thankyou.

38
15
53

Hi Lily,

that's fabulous!

I think that you deserve a gold star

Gold star.JPG

Do you want me to give you some more questions?
Maybe just 1 at a time?
If you do, I will put them in a new post just for you!

Yes plese

What is a conjecture?