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Adding fractions: 7/10+13/100
Sal uses visual models to add 7/10 and 13/100.
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- wow this is like addition! But with fraction!(10 votes)
- GUYS This is very easy,7/10=70/100 add 13/100 the final nuber is 83/100(9 votes)
- thanks for telling me(2 votes)
- if 7/10 is 70/100 what is 70/10, 700/100?(4 votes)
- Yep! A really easy way to see if 70/10 and 700/100 are equivalent is solve them. 70/10 is equal to 70 divided by 10. The quotient is 7. 700 divided by 100 is also 7. Now we know that they are both equivalent.(3 votes)
- I couldn't figure it out when I stopped the vidio.Could you(3 votes)
- it is like this, first turn the 10's into 100' by multiplying by ten then add normally like 8/10 + 14/100 so 8x 10 = 80 and 80+14=94 so 94 is the answer(3 votes)
- Why when we are doing the fraction like 80/100 or 50/100 why do have to multiply why can't we divide, add or subtract.(2 votes)
- but it looks like you multiply both numerator and denominator by ten(2 votes)
- it froze for some reason(2 votes)
- How do you multiply 7/10 by 10/10?(1 vote)
- By the conventional methods, the numerators , 7 and 10, multiplied together will give 70, and the denominators, both 10, multiplied together will give 100. But if you reduce the 10/10 to the simplest form, you won't really be needing to do any multiplying at all.(2 votes)
- how do you know which one to do first?(2 votes)
- [Instructor] So what we're going to try to do in this video is add 7/10 to 13/100, pause this video and see if you can figure what that is. Alright so despite being a little bit intimidating at first because we're adding tenths here, 7/10 and we're adding hundredths here 13/100, how do I add a certain number of tenths to a certain number of hundredths? The key idea is to re-express 7/10 as a certain number of hundredths, so how do we do that? Well let's just first visualize each of these fractions. So 7/10 if we imagine this square is a whole and that we've divided it into ten equal sections I tried to hand draw it as best as I can, notice I have filled in seven of those ten equal sections that we have split the whole into. So this represents 7/10 and 13/100 you could split the whole into 100 equal sections and I tried to hand draw it, let's assume that these are 100 equal sections. And so notice this is a ten by ten square, it's got 100 of these squares and notice we have ten plus three 13 filled in so we want to add these 7/10 to these 13/100. Now how do we express 7/10 in terms of hundredths? Well visually you could take each of your tenths and split them into ten equal sections, now you have your whole split into hundredths and each of your tenths is now a hundredth so you have ten times as many things in the denominator and you also have ten times as many things in the numerator. Before you had seven of the tenths filled in, now you have 70 of the hundredths filled in. Or another way to think about it, we multiplied the numerator by ten and the we multiplied the denominator by ten. And if you do the same thing to the numerator and the denominator, you multiply or divide it by the same number, you're not changing the value, think about it, ten over ten is the same thing as one, so we're just taking one and multiplying it by 7/10 isn't going to change the value. But this is as we already talked about this is equivalent to 70/100, so this is equal to 70/100 which is this right over here plus 13/100, plus 13/100. Well now we're adding 100s in both cases, if I have 70 of something and I add to that 13 of the same somethings in this case the something is hundredths, I'm going to have 83 of that so this is going to be 70, get the same color, this is going to be equal to 70 plus 13, plus 13/100. 70 plus 13/100 and what's 70 plus 13, well that of course is going to be 83/100. And we are done.