Topic 3 Review

Powers of 10

100

Write an expression that is equivalent to 9,000 using at least THREE numbers

(90x10x10)  (3 x 3 x 10³)

(30x30x10)  (30 x 3 x 10²)

(3,000x3x1) (Something that equals 9,000 that Ms. Rodman approves:)

200

What number does this represent in standard form? 10⁶

1,000,000

300

What is 75 x 10⁵?

7,500,000

400

How many places would you shift the numbers to the left in this equation: 

7.69 x 10⁴? 

Four places to the right because it is multiplying by ten four times.

500

What is the answer to this equation:

5.06 x 10⁴

50,600

Multiplying Greater Whole Numbers

100

If I have 75 bags of potatoes and there are 105 potatoes in each bag, How many potatoes do I have in all?

7,875 Potatoes

200

What is 168 x 34?

5,712

300

Does 17 make this sentence true?

134 x _____ = 2,376

No, 134 x 17 = 2,278

400

Does 25 make this sentence true?

66 x ____ = 1,650

Yes

500

What is 621 x 17?

10,557

Properties of Multiplication

100

What property of multiplication is this showing?

1,797 x 1  = 1,797

Choices: Commutative, Identity, Associative, or Zero

Identity Property: any number multiplied by one is itself

200

What property of multiplication is this showing?

897 x 0 = 0

Choices: Commutative, Identity, Associative, or Zero

Zero property: Any number multiplied by zero is zero

300

What property of multiplication is this showing?

2,345 x 56 = 56 x 2,345

Choices: Commutative, Identity, Associative, or Zero

Commutative Property: the order of numbers in a multiplication problem does not change the product

400

What property of multiplication is this showing?

3 x (9 x 20) = (3 x 20) x 9

Choices: Commutative, Identity, Associative, or Zero

 

Associative Property: The product of three or more numbers remains the same regardless of how they are grouped 

500

What property of multiplication is this showing?

(32x45) x 60 = 32 x (45 x 60)

Choices: Commutative, Identity, Associative, or Zero

Associative Property: The product of three or more numbers remains the same regardless of how they are grouped 

Miscellaneous

100

What is the best color to wear on a friday at Greenfield?

RED OF COURSE!

200

How many times do you move numbers to the left in this equation?

3.45 x 10⁷

Seven times, because you are multiplying the number by 10 seven times.

300

Is 3,198 a reasonable product for 727 x 44? Why or why not?

No, because even just estimating 700 x 40 would put the number at 28,000 so it would need to be greater than 28,000.

400

The Janis School District ordered 30 cases of dry-erase markers. Each case contains 48 boxes of dry-erase markers. How many boxes of dry-erase markers did the Janis School District order?

1,440 boxes

500

If I have 15 boxes of cookies and there are 32 cookies in each box. Would I have enough cookies for everyone in my class to have 10 cookies? (I have 45 students in my class) Please give a detailed explanation why.

Yes, because 15 x 32(480) is greater than 45 x 10(450)!