1
00:00:00,500 --> 00:00:01,420
- [Instructor] We're told,

2
00:00:01,420 --> 00:00:05,900
the table gives the amounts
of materials Aya recycled.

3
00:00:05,900 --> 00:00:07,550
So we have the different materials here,

4
00:00:07,550 --> 00:00:09,260
and then it gives the various amounts.

5
00:00:09,260 --> 00:00:13,890
How many kilograms of paper
and aluminum did Aya recycle?

6
00:00:13,890 --> 00:00:17,410
So pause this video and see
if you can figure this out.

7
00:00:17,410 --> 00:00:20,950
Okay, so we're thinking
about paper and aluminum,

8
00:00:20,950 --> 00:00:24,000
so paper is right over here.

9
00:00:24,000 --> 00:00:27,950
She recycled 277 kilograms of paper.

10
00:00:27,950 --> 00:00:30,750
And aluminum is right over here.

11
00:00:30,750 --> 00:00:33,640
She recycled 134 kilograms of aluminum.

12
00:00:33,640 --> 00:00:36,260
And so we want the
combination, or the sum,

13
00:00:36,260 --> 00:00:39,540
of paper and aluminum, so it's going to be

14
00:00:39,540 --> 00:00:44,540
277 kilograms plus 134 kilograms.

15
00:00:46,880 --> 00:00:50,680
So we really need to figure
out what 277 plus 134 is,

16
00:00:50,680 --> 00:00:52,330
and in multiple videos, we have talked

17
00:00:52,330 --> 00:00:55,470
about how there's many different
ways of approaching this.

18
00:00:55,470 --> 00:00:58,930
We could say, well let's
just break up the 134.

19
00:00:58,930 --> 00:01:01,680
We could start at, actually let
me do this on a number line.

20
00:01:01,680 --> 00:01:03,750
That sometimes is a fun thing to do.

21
00:01:03,750 --> 00:01:07,420
So if we were to just say,
this is our number line,

22
00:01:07,420 --> 00:01:11,603
and we're going to start
at 277 right over there.

23
00:01:12,570 --> 00:01:16,780
So first, we could add
100, because we have 100

24
00:01:16,780 --> 00:01:18,490
right over there, so let's do that.

25
00:01:18,490 --> 00:01:23,240
If we add 100, so plus
100, where does it get us?

26
00:01:23,240 --> 00:01:27,720
Well if we add 100 here, we get to 377.

27
00:01:27,720 --> 00:01:32,290
So 300, I'll just write, 77.

28
00:01:32,290 --> 00:01:36,410
And then we could add three 10s, or 30.

29
00:01:36,410 --> 00:01:38,610
So then we're going to add 30.

30
00:01:38,610 --> 00:01:43,610
So let's add 30, so plus 30.

31
00:01:44,260 --> 00:01:45,790
What does that get us?

32
00:01:45,790 --> 00:01:47,500
So this is interesting.

33
00:01:47,500 --> 00:01:52,500
If you add 30 to 370,

34
00:01:52,870 --> 00:01:56,510
you would get to 400,

35
00:01:56,510 --> 00:01:58,240
and then we have another seven there,

36
00:01:58,240 --> 00:02:01,790
so that gets us to 407.

37
00:02:01,790 --> 00:02:04,250
So then we get to 407.

38
00:02:04,250 --> 00:02:05,960
And once again, this is just one way

39
00:02:05,960 --> 00:02:06,960
to try to think about it.

40
00:02:06,960 --> 00:02:10,670
And then, last but not
least, we could add the four.

41
00:02:10,670 --> 00:02:12,820
So then you say, we're there right now,

42
00:02:12,820 --> 00:02:16,630
and then we add plus four,
and seven plus four is 11,

43
00:02:16,630 --> 00:02:20,590
so 407 plus four is 411.

44
00:02:20,590 --> 00:02:24,730
So how many kilograms of paper
and aluminum did Aya recycle?

45
00:02:24,730 --> 00:02:27,940
Would be 411 kilograms.

46
00:02:27,940 --> 00:02:31,203
Kilo, kilograms, and we're done.