Lattice Multiplication - Free Educational videos for Students in K-12 | Lumos Learning

Lattice Multiplication - Free Educational videos for Students in k-12


Lattice Multiplication - By tecmath



Transcript
00:0-1 Good day and welcome to the Tech Math channel .
00:01 What we're looking at today's video is how to multiply
00:04 any two types of numbers with one another . So
00:06 any type , any three digit by two digit or
00:09 a four digit by a three digit number . We're
00:11 going to have a look at these and look at
00:13 a different way of doing this . I've been looking
00:14 at this sort of thing in previous videos and I'm
00:16 gonna put a link up right now . There you
00:18 go there . Um , on different ways I do
00:20 this . But today it's going to be a bit
00:22 different because I'm looking at this using our boxes and
00:25 basically a little table . Very easy table to draw
00:27 and an easy way of doing this just in case
00:29 it might be a different way you prefer doing .
00:31 So without much further ado , let's work out 324
00:36 times 15 . So , how do we work this
00:41 out now ? That's what I said to do this
00:43 . I'm gonna be using these boxes now , we're
00:46 gonna need a table which is going to be three
00:49 boxes . What's more boxes ? Okay , so draw
00:54 this Here right now , there's my two by three
00:59 . And the other thing you draw on these tables
01:00 are these diving online , sloping down to the left
01:03 . It's very important . I think with this also
01:05 try to be as neat as you can . Otherwise
01:09 you're getting all sorts of troubles with math when you're
01:10 not , you're not being needed . You probably realize
01:12 . So 324 times 15 and how I'm gonna do
01:19 this is only go three times 12 times 14 times
01:23 13 times 52 times five and four times five .
01:27 I'm going to write the answers to each of these
01:29 questions . So the tens go in this part and
01:32 the unit's going this part . So three times one
01:34 is three , two times 1 is 2 . 1
01:39 times four is 4 , three times five is 15
01:43 , 5 times two is 10 and five times four
01:47 is 20 . There you go . Already got the
01:48 answers now . How do I get my final answer
01:51 ? Well , I just start adding up in this
01:52 diagonal direction , so let's have a look . Nothing
01:55 and nothing . There's nothing . Four plus two is
01:58 65 plus one , plus two is eight and four
02:02 plus three plus one is four . There you go
02:06 . That's the answer . That's pretty cool . Right
02:08 , we can do this with bigger numbers , I'll
02:10 put a bigger one up right now . Okay ,
02:13 so let's do uh 1342 , and We'll Times Act
02:19 by 600 , Okay , so we're gonna need a
02:27 box . How big ? That's right , three x
02:29 4 . So let's draw that in . Oh ,
02:32 here's the box . Which is gonna have to fit
02:37 three rose and for columns and these diagonal lines sloping
02:46 down once again , so . Mhm . All right
02:51 . In a question which is 13 42 times 643
03:01 . And I'll start putting in my answers now .
03:03 162663 18 , 64 24 to 6 to 12 .
03:11 Okay . Next next row , 14 is 443 12
03:17 , 4 , 4 - 16 . 4 to 8
03:21 . Okay . Next 113 is 33 threes and 934
03:26 12 and 3 to 6 . Now we can start
03:30 adding these up diagonally . Okay , we have a
03:32 62 plus eight is 10 , carry the one 10
03:37 , so one plus 9 is 10 , 11 ,
03:40 17 , 19 . Okay , carry the one .
03:44 One plus three is 467 11 , 12 carry the
03:51 one , one plus four is 56 one plus four
03:57 is 56 14 , 16 carry the one and six
04:03 plus one is seven plus . This one here is
04:05 so answer is 862906 . That's pretty easy . Right
04:13 ? It's a really , really good method . I
04:15 really , really like this method as well , tend
04:17 to use a slightly different way . I think the
04:18 bigger numbers actually in some ways prefer this method .
04:21 I think it's a nice simple cut and dry sort
04:24 of one , especially for kids and that sort of
04:26 deal . It's a really good way also of getting
04:27 to practice their times tables . It's a good one
04:30 . Also , if you don't buy juggling so many
04:31 numbers necessarily in your head at once . Okay ,
04:35 hopefully you like that method and you might give it
04:37 a bit of a shot . We'll see you next
04:40 time .
Summarizer

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Lattice Multiplication is a free educational video by tecmath.

This page not only allows students and teachers view Lattice Multiplication videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.


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