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Adding 53+17 by making a group of 10

Sal adds 53+17 by breaking apart the numbers and making a group of 10.

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• Can you show me a different way please?
• Another way is separating the tens from the ones in both numbers:(50+3) + (10+7)
Then reorganizing so the tens are together and the ones are together: (50+10) + (3+7)
And you get: (60)+(10)
Which adds up to become: 53+17=70
• How can this be equal to 53+17=70? Why?
• Well because if you were to break it down, into this 50 + 10 and 3 + 7
First, solve for 50 + 10, it equals 60
And 3 + 7 = 10
So 60 + 10 = 70
You get it?
• I have a problem that is 47+23
= 47 (__)+20
= (47 + __)+20
=__+ 20
= __
I've been working on this problem for an hour now and I still cant seem to figure out the problem somebody please explain this to me the video is not helpful thanks.
• you just had to separate the 3 from the 20

= 47 (3)+20
= (47 + 3)+20
= 50+ 20
= 70

Hope this helps.
• Why do you have to carry the one? Couldn't you just put it right next to the zero?
• No, you cannot just leave the answer as 610, because that would be 6 hundreds and 10 ones. Note that 53+17 is 6 tens and 10 ones.

Have a blessed, wonderful day!
• How do you figure out 53+17?
• 53+17
=50+3+17
=50+20
=70
• 53+17 is easy for me
(1 vote)
• what's 45 + 67
(1 vote)
• 45 + 67 can be answered by lining up the numbers like so (please ignore the hyphens, they are for formatting purposes) :

-- 45
+ 67
=

First, add the two left most numbers, those being 5 an 7. The result of this is 12, so place a 2 in the "ones" section of the answer and a 1 above the "tens" section of the question like so:

-- 1
-- 45
+ 67
- = 2

Next, add all the numbers on the left most part of the equations togethers, including the one on the top. This would be 1 + 4 + 6, resulting in 11. This can be placed directly in the answer place, considering that there are no more numbers to the left.

-- 1
-- 45
+ 67
= 117

And thus, we have our answer, 117 . I hope this helps :D