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## 1st grade

### Unit 2: Lesson 7

Word problems with "more" and "fewer"# Comparison word problems: roly-polies

Sal solves word problems comparing 2 numbers. Numbers in the problems are less than 10.

## Want to join the conversation?

- What is a roly-polie?(33 votes)
- Yes, and to add to the answer of OmniHex, they're also known as pill bugs, more specifically, Armadillidiidae. Some may have seen a different kind of roly-poly, known as the pill millipede. They have the ability to conglobulate, (roll into a ball) which is a similar trait shared between the two.

http://en.wikipedia.org/wiki/Armadillidiidae

http://en.wikipedia.org/wiki/Pill_millipede(25 votes)

- i still don' quite get this still after the video(6 votes)
- Her is an example: Mia has 10 marbles, Diana has 1 less than Mia. How many marbles does Diana have?

What we know:

~Mia has 10 marbles

~Diana has 1 less than Mia

What we want to know:

~How many marbles Diana has if she has one less then Mia.

How will we find our answer:

~ Through subtraction

10

- 1

-----

9

So, in conclusion, Diana has 9 marbles and Mia has 10.(11 votes)

- If Ki has a square cake and a rectangle cake. The rectangle cake is cut into equal squares. Ki now has 5 square cakes how many cakes did Ki get from the rectangle?(7 votes)
- Ki has 5 cakes, one of which is the original square cake. Subtract 1 cake (the first square cake) to get 4 cakes, which is the amount of cakes Ki got from the rectangle cake.(5 votes)

- guys after this it did not help can you guys help me(6 votes)
- Ok, Ethan thats good but let me try ;) .

ok so Bob has 9 marbles, and Alice has 2 less marbles than Bob. How many marbles does Alice have?

It says less, less means take away so subtract.

lets try one more, Bob has 9 marbles, and Alice has 2 fewer marbles than Bob. How many marbles does Alice have?

Samething it says fewer which is subtraction

ok lets try plus

Bob has 9 marbles, and Alice has 2 more marbles than Bob. How many marbles does Alice have?

more means plus so ya hope this helps(1 vote)

- ill give u a question

so millie had 11 bugs Then Kelly had 20 bugs so how many millie and kelly had?

11

20

--(5 votes)- we just need to add 11 and 20 = 31(6 votes)

- dingane what the crazy name(4 votes)
- Lea is the name of the person who has the roly-polys.(3 votes)

- A roly-poly is a type of bug that can roll up in a little ball(5 votes)
- ok this is test comment where does this lantd(6 votes)
- So do u have to add or subtract in these videos.(4 votes)

## Video transcript

- [Instructor] Lea has nine roly-polies. Let's write that down. Lea has nine roly-polies in her bug house. She has one more than Dingane, is I think how I would say that name. How many roly-polies does Dingane have? Dingane have. So that's what we need to figure out. So we need to figure
out how many roly-polies does Dingane have. So this right over here
is our question mark. Now it's always good. When you look at a word
problem like this you say, okay will Dingane have
more or less than Lea? Well it says she, Lea,
has one more than Dingane. So Lea is going to have more, and how much more? One more, so Dingane is going
to have one less than Lea. If Lea has one more, then
Dingane has one less than Lea. So how do we write one less? Well we could just subtract one. So this right over here,
this is one less, one less. This is saying that Dingane
has one less than Lea. So how much does Dingane have? Well he's going to have eight roly-polies. Eighth roly-polies. Now another way you could have done it, you could have drawn Lea's roly-polies. One, two, three, four, five, six, seven, eight, nine, and that would have been them rolled up, and you said okay that's
one more than Dingane. So Dingane has one less than this. So one less than this. You just take away one of these and you're left with one, two, three, four,
five, six, seven eight. You're left with these right over there. Let's do one more of these, woops. All right, let's do one more. So they tell us the mass of a small box is seven grams less than the large box. The mass of the small box is six grams. So let's write that. They tell us the small box, small box, it has a mass of six grams. And we need to figure out what is the mass of the large box. Large box. This is what we need to figure out. So this is a question mark. Now like we did in the last problem, is a large box gonna have a
larger mass or a smaller mass? And we shouldn't just look
at the names of the box, we should look at what they tell us. They tell us that the
mass of the small box is seven grams less than the large box. So this, the small box
is seven grams less than the large box. And that's another way of
saying that the large box is seven grams more than the small box. So another way to say seven grams more, the small box is six
grams plus seven grams. That's seven grams more. That's going to equal the
mass of the large box. So what's the mass of the large box? Well six plus seven is 13. Six plus seven is 13, and we're done.