Rounding
Estimates & Exact Answers
Multiples
Factors
Prime & Composite
100

What is 237 rounded to the nearest hundred?

200

100

A reasonable estimate for 205 + 498 is ________. 

700

100

The seventh multiple of 10 is 

70

100

What are the factors of 32?

1, 2, 4, 8, 16, 32

100

Which number is prime?

A. 26.   B. 33.     C. 40      D. 47

D. 47 

200

What is 1,290 rounded to the nearest hundred?

1,300

200

A reasonable estimate of 2,858 x 3 is__________ (round to the nearest hundred).

2,900 x 3

200

The first two common multiples of 4 and 9 are...

36 and 72

200

3 is a common factor of 42 and 60. 

True or False?

True 

200

Which number is composite?

A. 1   B. 2.   C. 3.  D. 4

D. 4

300

What is 26,650 rounded to the nearest hundred?

26,700

300

What is the best estimate of 2,264 + 8,721? (Round to the nearest hundred) 

11,000

300

What is the least common multiple of 10 and 12?

A. 6    B. 10   C. 60  D. 120 

C. 60 

300

What are the common factors of 36 and 60?

1, 2, 3, 4, and 6.

300

Which number is neither prime nor composite?

1

400

What is 21,073 rounded to the nearest thousand?

21,000

400

Do you need an estimate or exact answer?

 Meg bought 4 bags of candy bars to pass out on Halloween. Each bag had 68 candy bars inside. How many candy bars did Meg have altogether?

Exact answer. 272 candy bars

400

What is the least common multiple of 24 and 36?

72 

400

The greatest common factor of 36 and 60 is _______

6

400

Is 91 prime or composite?

Prime 

500

What is 99,900 rounded to the nearest thousand?

100,000

500

Do you need an estimate or exact answer?

The large leaf blower costs $298. The smaller one costs $189. About how much is the difference in price?

Estimate. About $100. 

500

36 is the least common multiple of 9 and _______. 

A. 5      B. 10      C. 12.    D. 15

C. 12

500

What is the greatest common factor of 24 and 48 ?

A. 12.    B. 24.   C. 48.    D. 60 

B.24

500

Is 78 prime or composite?

Composite