Math Unit 1 Review

Math Unit 1 Review

by Emma Massie

​Standard Form/Expanded Form

​Standard form: A number written in familar form - 12,543

​

​Expanded form: A number broken up into its place value pieces - ​10,000 + 2,000 + 500+40+3

​

Multiple Choice

Which one is the correct way to write 36,425 in expanded form? 

• 3,000+600+40+2+0.5

• 30,000+6,000+400+20+5

• 36,425

• 30,000, 6,000, 400, 20, 5

Estimate + Approximation ​

​Estimate:  a thoughtful guess that is near to a reasonable answer. When we find an approximate answer we are making an estimate. 

​

​Approximate: a close answer that is not 100% accurate

Fill in the Blank

Estimate the answer by first rounding the numbers to the nearest thousand: 

7,890 + 5,236 ≈ 

​Multiples and Factors

• Multiple: the whole number you get when you multiply two factors. 

  Factor: A whole number that when multiplied by another whole number gives a product

• Prime number: a number greater than 1 that has exactly two factors: itself and 1

• Composite number: ​has at least 2 factors that are not 1.

Multiple Choice

All the factors of 15 are...

• 1,3,5,15

• 1,2,3,5,15

• 2,4,6

• 15,5,2,1

Multiple Choice

A number having more than two factors is called

• composite

• prime

• oddd

• even

Fill in the Blank

The prime factors of 9 are... 

Multiple Choice

Joe has listed the first 4 multiples of 7 as: 7   14    22     28. Which one is incorrect?

• 7

• 14

• 22

• 28

Multiple Choice

What is the prime factorization of 18?

• 2 X 2 X 2 X 3

• 3 x 3 x 3

• 2 x 3 x 3

• 6 x 3

Multiple Choice

Which is the correct way to write 2 X 3 X 3 with exponents? 

• 2 x 3²

• 3 X 2²

• 2X2X3

• 3X2X2

Multiple Choice

75 X 10

• 7.5

• 7,500

• 750

Multiple Choice

6 X 10³

• 6,000

• 600

• 60

• 6

Multiple Choice

321,000 ÷ 10³ =

• 32,100

• 321

• 3,210

Open Ended

One new thing I learned throughout this math unit was...