Quiz #1 Decimals, GCF, and Making 10

What does GCF stand for?

• Grab Common Factor

• Greatest Common Factor

• Goal Command Fraction

• Guess Calculate Fraction

When you multiply numbers with decimals, do you line up the decimals?

• Yes, lining up the decimals will give you the accurate answer.

• Yes, lining up the decimals makes the equation look nicer.

• No, the decimals only line up in word problems.

• No, decimals only need to be lined up for add/ subtraction equation NOT multiplication.

Answer explanation

When multiplying numbers the decimals do not need to line up. Once all your multiplication is done you will count how many decimal places you will ned to move at the end.

Tags

CCSS.5.NBT.B.7

Which equation is the same as this one when making 10 in an equation to solve?

7+5=_

• 10+7=_

• 10+7+5=-

• 10+2=_

• 10+5=_

Answer explanation

When making 10 in an equation we are combing the two numbers in the equation together. Larger number we make into 10 and the small number because even small makes the equation simplified.

Tags

CCSS.2.NBT.B.5

What is the greatest common factor of 24 and 36?

• 2

• 4

• 6

• 12

Answer explanation

All of the answers of Factors o 24 and 36, but 12 is the only GREATEST COMMON FACTOR.

How many decimal places will you be moving in your final answer?

3.5 x 14.37

• 2

• 5

• 3

• 1

Answer explanation

14.37 <--- 2 decimal places

x 3.5 <--- 1 decimal place

--------

50.295 <--- 3 decimal places

Tags

CCSS.6.NS.B.3

Show me how you would make the equation 8+4=_ into an equation that has the number 10 in it?

Answer explanation

8+4=_

Make 8 a ten because it is the closest number out of the two to 10.

10+_=_

Now that the 8 is a 10 how many did we borrow from 4? We borrowed 2, now making the number 4, 2.

10+2=

Now your equation is simplified and easier to solve.

Tags

CCSS.2.OA.A.1

Why do you find the GCF of two factors? Provide an example.

Answer explanation

The reason you find the GCF of an equation is to help find the largest divisor that can go into the two separate numbers. This can help when you progress into fractions later on in the year as well.

36 and 54

The greatest common factor is 9. Finding the GCF helps with finding simplified fractions, divisors, and similarities between the numbers.

Name one thing you have mastered and one thing you would like to improve on in your math skills.

(a)  

How do you think you did?

• I need to study a lot more!

• I think I did an okay job.

• I think I understand all the information, but one more day I will perfect it.

• I did great and I'm a master at all these topics!

How does creating the number 10 in an equation make it easier to solve?

Answer explanation

Any single-digit number plus 10 will replace the 0 with itself. This helps with groups number and it simplifies an equation to create quick solving.

Tags

CCSS.1.OA.A.1