Lumos NJ ASK Grade 3 Math Video Sampler - Multiple Choice Questions - Free Educational videos for Students in K-12

Lumos NJ ASK Grade 3 Math Video Sampler - Multiple Choice Questions - By Lumos Learning

Transcript


00:29	Hello . Welcome to the luminous Learning Video sampler for
00:32	Grade three . My name is Luis Anthony AST .
00:36	I am a professional mathematics tutor , and I'm here
00:38	to show you how easy math can be . I
00:43	will be going over select questions from the diagnostic test
00:47	that is provided online and in print form . When
00:50	each question is presented in the video , I want
00:53	you deposit right after the choices of A , B
00:56	, C and D are listed . Try to answer
01:00	the question and then press play to see the correct
01:03	answer and my explanation . Now let's get started .
01:12	Which of these expressions has a difference greater than 50
01:32	? The correct answer is deep 100 minus 48 .
01:36	Where you get this is that difference means subtraction ,
01:38	which we can see here . So just evaluate .
01:41	Just perform subtraction on each of these , and I
01:45	do that over here . It gives me exactly 50
01:48	but I want greater than 50 b and C gives
01:51	you values . There are less than 50 . Only
01:54	D has a value that's greater . Which of these
02:01	shapes has exactly two lines of symmetry ? The answer
02:38	is going to be D . The reason for that
02:41	is that a has three lines of symmetry . B
02:44	has eight . See has four and D has the
02:49	two lines of symmetry . Which point is located at
02:59	three comma one . The point you're looking for is
03:17	Point B , which is Choice B . How do
03:21	we find it ? First off , I realized that
03:24	the coordinates three comma one mean ex movements and Y
03:28	movements . X represents horizontal movement . This is the
03:31	X axis . The why movement is the second part
03:37	. It's a vertical . So you're gonna start off
03:39	at 00 go three steps or units or squares the
03:43	right . 123 And the one tells you you can
03:46	go one minute upward . What ? So that is
03:50	Point B . Pencils are sold in packages of 12
03:58	. If Mark needs 48 pencils , how many packages
04:02	should he buy ? The correct answer is deep or
04:20	packages . How can we get that ? Well ,
04:23	first off , we know that there's 12 pencils in
04:26	one package . Wait a minute . If there's 12
04:29	in one package , well , it can't be Be
04:32	so you can cross that out . Can't be C
04:35	two packages across that investors 24 . The answer must
04:38	be either a or deep . How can you figure
04:42	that we'll go 12 times six . That's 72 too
04:45	much . So it has to be D or you
04:47	can actually go 12 times 4 48 . So it
04:50	has to be the Anthony left for school with $2.75
04:59	in his pocket . Along the way , eight dimes
05:03	fell out of his pocket . How much money did
05:05	he have when he arrived at school ? And he's
05:23	going to have $1.95 left in his pocket when he
05:26	arrived in school . So the answer is deep .
05:30	By the way , you can actually eliminate one of
05:32	these choices . If you think about the fact that
05:33	if you start off with $2.75 and you lose eight
05:37	dimes , there's no way you're gonna have $2.67 in
05:41	your pocket . That means you've lost a few pennies
05:44	along the way . And then it happened so you
05:46	can cross that up . Maybe . How can we
05:49	actually get this answer ? Well , he loses eight
05:53	dimes , one dime , 10 cents . You can
05:56	write in this form , so 10 cents times eight
06:01	is 80 cents . So let's subtract that from the
06:04	money he had to start off with . So you
06:07	have $2.75 to start off with . Take away .
06:12	We're gonna put this in dollar form because the first
06:14	amount is in dollar . For when we do the
06:17	subtraction , you're gonna get 1.95 which is $1.95 .
06:29	Donna must practice for violin for 30 minutes each day
06:33	. If she starts practicing at 7:50 p.m. When should
06:36	she stop ? The answer is B 8 . 20
06:53	PM . Are there any answers you could eliminate right
06:57	away ? Mm . How about D eight PM ?
07:02	That's to close to 8 . 50 ? I think
07:06	so . I would not guess that because you're going
07:09	30 minutes for practice . How can you actually do
07:14	this ? Well , how about visualizing oclock ? We
07:18	have 7 . 50 on here , and you want
07:20	to add 30 minutes to this . An easy way
07:23	of doing that is first at 10 . To get
07:26	exactly eight o'clock and 10 minutes plus 20 minutes is
07:31	30 minutes . So if people 20 minutes past that
07:36	, that's going to be our answer 8 . 20
07:38	PM Which of these units should be used to measure
07:45	the height of a flagpole . I would say the
08:01	best choice is the yards Now . Were you able
08:06	to eliminate into the choices while you were solving this
08:10	? How about be pounds ? Pounds is not a
08:15	unit of length . It's of the weight , for
08:17	example , how heavy someone is . What ? Just
08:22	kidding . So let's take a look at the others
08:27	. Let's pretend and this is a flagpole . I
08:30	want to figure out what is its height . Would
08:33	Miles be a good choice ? It's too long a
08:38	unit of measurement for something like this . Use Moss
08:42	, for example , to measure the distance between cities
08:46	. What about inches ? No . Yeah , for
08:51	example , I had a rule like this . Like
08:53	with inches on it . Yeah , I can measure
08:56	, but it's too small . You would have way
08:59	too in inches on this thing . What about yards
09:04	? Well , here's a yardstick . Could I use
09:06	this to measure how tall this flagpole as well ?
09:10	Yeah . Concerned about it is that the one yard
09:12	two yards three and so on . It seems reasonable
09:16	to use this unit of length . Mm . That's
09:20	why I think D is the best choice . That
09:27	was the last problem for this video . Don't worry
09:31	. If you visit Loomis test prep dot com ,
09:33	you can find hundreds of additional ones

Summarizer

DESCRIPTION:

In this video Mr. Luis Anthony Ast provides detailed answers to some of the Lumos Grade 3 Math Diagnostic test questions. LumosTestPrep.com LumosLearning.com Lumos Learning - Supplemental Programs by Expert Teachers

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