Mastering Multiplication: Exploring Multiplying by Tens

Mastering Multiplication: Exploring Multiplying by Tens

Multiple Choice

A way to write a numbers by using the digits 0-9 with each digit having a place value.

• standard form
• word form
• expanded form
• expanded notation

Standard Form

• Standard form is how numbers are usually presented.

  • 603

  • 620,094

  • 9

  • 234,209,344

Multiple Choice

A way to write numbers by using words.

• standard form
• expanded form
• word form
• expanded notation

Word form

• It is numbers but written as words.

  • 63=sixty-three

  • 893= eight hundred ninety-three

  • 69,000= sixty-nine thousand

  • 325,837= three hundred twenty-five thousand eight hundred thirty-seven

Multiple Choice

Pick the number that matches the word form: seven hundred thirty-nine

• 397
• 793
• 379
• 739

Multiple Choice

The city of Centralia has a population of 13,032. How would you write this number in word form?

• Thirteen thousand, three hundred thirty-two
• Thirteen thousand, thirty-two
• Thirteen thousand, three hundred twenty
• Ten and three thousand, thirty-two

What is Expanded Form?

• Numbers in expanded form are like equations based on place value.

• 63 = 60 + 3

• 800 + 40 + 9 = 843

• 80,000 + 90 + 8 = 80,098
  

Multiple Choice

What is the value of the underlined digit?

415

• 4

• 40

• 400

Multiple Choice

What is the value of the underlined digit?

836

• 3

• 30

• 300

Multiple Choice

What is 24 in expanded form?

• 2+4
• 20+4
• 200+4

Multiple Choice

What is 912 in expanded form?

• 900 + 10 + 2

• 9 + 1 + 2

• 90 + 10 + 20

Mastering Multiplication: Multiplying by Tens

When multiplying a number by 10, the product is always the number followed by a 0.

• ​For example, 23 x 10 is 230. (Which is like 23 tens.)

• It is not correct to say that 23 x 10 is 23 add 0.
  

• Remember, multiplying by 10 always tags a 0 at the end. It's a simple and useful trick in math!

When we multiply by ten, we are moving one place left on the place value chart. Any place missing a digit, needs a zero.

• 1 x 3 = 3

• 10 x 3 = 30 (three tens = 30)

• 100 x 3 = 300 (three hundreds = 30 tens = 300)

• 1000 x 3 = 3000 (three thousands = 30 hundreds = 300 tens = 3,000)

Multiple Choice

What is the result of multiplying a number by 10?

• The number followed by a 0

• The number followed by a 1

• The number followed by a 10

• The number followed by a 100

Do you notice the pattern?

• 1 x 5 = 5

• 10 x 5 = 50

• 100 x 5 = 500

• 1000 x 5 = 5000

Multiple Choice

What is the product?

100 x 6 =

• 6

• 60

• 600

• 6000

Multiple Choice

What is the missing factor?

__ x 7 = 7000

• 1

• 10

• 100

• 1000

Multiple Choice

What is the product of 40 x 12?

• 120

• 240

• 400

• 480

Each place value is ten times greater when moving to the left.
If I move multiple jumps, I have to do multiples of ten. For example:

• From the ones to the hundreds is x10 x10 (or x100) Skipping two places

• From the ones to the thousands is x10 x10 x10 or x1000) Skipping three places

So if I have the number 16,562

• The six in the thousands place is 100 times greater than the six in the tens place

• (I skipped two places)

In the number 34,239

• The value of the 3 in the ten thousands place is 1,000 times greater than the value of the 3 in the tens place

• (I skipped 3 places)

Multiple Choice

How many times greater is the 5 in the ten thousands place than the 5 in the ones place?

53,125

• 100 times greater

• 1000 times greater

• 10,000 times greater

• 100,000 times greater

Multiple Choice

The value of the 7 in the number 6,731 is how many times larger than the value of the 7 in the number 673?

• 10 times

• 2 times

• 7 times

• 100 times

Multiple Choice

In which of the following pairs of numbers is the value of the 3 in the first number 10 times the value of the 3 in the second number?

• 135 and 37

• 513 and 73

• 131 and 73

• 132 and 37

Factor Rainbow

Start with the number x 1

Keep going until you start repeating

Take a look at the factors of 72

1 x 72

2 x 36

3 x 24

4 x 18

6 x 12

8 x 9

Multiple Select

What are the possible dimensions of a rectangle with an area of 30?

• 1 x 30

• 3 x 10

• 4 x 5

• 5 x 6

Multiple Choice

What type of number is 30 based on your work with the previous question?

• Prime Number

• Composite Number