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Math In Focus: Chapter 2: Estimation and Number Theory Flashcards | StudBud
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Math In Focus: Chapter 2: Estimation and Number Theory
Math In Focus: Chapter 2: Estimation and Number Theory
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#math in focus #4thgrade
Flashcards
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Questions
20
Answers
1
The answer in multiplication is called
product
the answer
sum
quotient
2
A common factor is ONE number that other numbers share.
True
I don't know
False
maybe
3
Name a common factor of 3 and 9.
2
3
6
9
4
True or False 18 is a prime number
False
True
5
<p>When using the first digit of a number to estimate it's called</p>
guessing
front-end estimation
rounding
6
The first six multiples of 3 are 3, 6, 9, 12, 15, and _______
27
30
18
21
7
Is 63 a mutliple of 9?
No
<p>Yes</p>
Not sure
maybe
8
Is 2 a factor of 27?
No
Yes
9
What is the eighth multiple of 9?
72
8
<p>56</p>
64
10
Name 3 factors of 12.
12,8,14
1,10,12
7,15,24
2,3,4
11
What is the answer when using rounding to estimate 567+986=
900+600=1,500
500+1,000=1,500
600+1,000=1,600
500+900=1,400
12
An example of a composite number is 25
False
True
13
The ________ of two or more numbers is less than all other common multiples.
Prime Number
Factor
Greatest Common Factor
Least Common Multiple
14
When using rounding to estimate 345+213 you get...
400+200
300+200
345+213
15
Is 20 a multple of 5?
Maybe
<p>Yes</p>
No
16
Which number is a composite number?
5
59
33
1
17
What is 1,340 rounded to the nearest thousand?
2,100
1,300
1,000
2,000
18
The factors of 24 are 1, 2, 3, 4, 6, 8, _____, and 24
15
36
10
12
19
What are the first 4 multiples of 6?
30,36,42,48
10,20,30,40
1,2,3,4
6,12,18,24
20
You can ________to check that an answer is reasonable.
add
multiple
round
estimate
