Early math review
Comparison word problems: marbles
Sal solves word problems comparing 2 numbers. Numbers in the problems are less than 10.
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- Can addition and subtraction relate to one another?(11 votes)
- They are opposites of each other.(7 votes)
- Can I use math to impress others? That seems very fun.(7 votes)
- Absolutely, math is to be enjoyed and if learning math to impress friends and family members is what you wish to do, then, by all means, go for it!(4 votes)
- Do you have language or geometry(2 votes)
- Khan Academy doesn't have lessons on language but it does have Grammar.
It also has Geometry (this link is to the high school geometry) https://www.khanacademy.org/math/geometry(7 votes)
- what does fewer mean i mean ya its noting or its someting like ok sorry its someting.im supur sorry sorry sorry.(4 votes)
- It means if there is more or less things you have.(3 votes)
- Mary has 89 toys and shawn has 75 toys how many more toys does Mary
Use this eqauation to solve this problem
- If we want to know how much more of something there is than another, we can use subtraction to find the difference between the two. Since we want to know how many more toys Mary had, we subtract Shawn's toys from Mary's. This gives us 89 - 75. As with any problem, we have to do each place value, one by one:
9 - 5 = 4
80 - 70 = 10
Combine the answers together, and you get 14. Mary had 14 more toys than Shawn had. Hope this helps!(2 votes)
- so how do you se the value in the number?(3 votes)
- It is the value of the number represents when the number is underlined in that problem.(2 votes)
- does anybody know what x=3/4?(1 vote)
- x=3/4 is the most simplified fraction form, as a decimal x=0.75
To explain, 1/4 is the fraction form of 0.25 and 3/4 is the same as 3*1/4, so in decimal form, x=0.75(2 votes)
- think you are confusing the number and the letter. The letter can be heavier. We usually don't talk about heavy numbers in math. We say larger numbers. (There is actually something called heavy integers but that is a rather advanced topic to go through here. Keep the answer in the back of your mind, and when you have learned to divide you can try to find out what it is :-)(2 votes)
- what is the answer to number 4(1 vote)
- Do u have history or language?(1 vote)
- [Voiceover] So they tell us that Alexander has nine marbles, Emily has five marbles. And then we're asked, how many more marbles does Alexander have than Emily? So pause the video and try to see if you could figure this out. Now let's work this out together. So let's just draw it out. Alexander has nine marbles. So we could draw his marbles. So one, two, three four, five six, seven eight, nine. And Emily has five marbles. One, two, three, four, five. So how many more marbles does Alexander have than Emily? Well we can see it in this picture right over here. These are all the... So, up until this point this is the same number that Alexander has as Emily. And then Alexander has... Alexander has... We see it right over here, he has one, two, three, four more marbles. Now what's another way that we could have thought about it? Well, Alexander has nine marbles and if you were to subtract the number of marbles Emily has, that's how much more marbles Alexander has. That's how much more nine is than five. So you could have said nine minus five is equal to... Is equal to the four... the four marbles. That's how much more marbles Alexander has than Emily. Let's do another one of these. Noa was mailing two letters. The heavier letter... The heavier letter had eight stamps. The lighter letter had five fewer stamps. How many stamps did the lighter letter have? So once again, try to pause this video and see if you can figure it out on your own. So the heavier letter, it's always useful to just, well, what are they telling us? So they are saying, just write down whatever information they give us. So the heavier letter has eight stamps, the lighter letter has five fewer stamps. So do we know how many the lighter letter has? Well not immediately. That's what they're actually asking us. How many stamps did the lighter letter have? But it's five fewer. Five fewer than what? Five fewer than eight stamps. And so we could write that. If we have eight stamps and we want to go five fewer than that... Five fewer... Well that's going to be eight minus five. This is five fewer than eight, which is going to be equal to three. The lighter letter has three stamps. Now another way you could have thought about it, The heavier letter had eight stamps. Let's draw eight stamps. So one, two, three, four, five, six, seven, and eight. That's how much the heavier letter had. The lighter letter had five fewer stamps. Let's take away one, two, three four, five. And what are you going to be left with? Well you're going to be left with these three stamps right over here. This is how many stamps the lighter letter had.