Chapter 4:Multiply Decimals

Decimal A number with one or more digits to the right of the decimal point.

Expanded Form A way to write a number that shows the value of each digit.

Hundredths One of one hundred equal parts

Multiplication

The process used to find the total number of items in a given

Ones The value of a digit in the ones position on a place value chart

Pattern A repeating sequence that follows a rule that repeats

Place Value The value of a digit in a number based on the location of the digit

Product The result when you multiply two numbers

Tenths One of ten equal parts

Thousandths One of one thousand equal parts

Lesson 4-1: Multiplication Patterns with Decimals

1 X 0.35 =

10 X 0.35 =

100 X 0.35 =

1,000 X 0.35 =

1 X 2,154 =

0.1X 2,154 =

0.01X 2,154 =

0.001 X 2,154 =

100

101

102

103

X 24.46 =

X 24.46 =

X 24.46 =

X 24.46 =

7.02 X 1 =

7.02 X 10 =

7.02 X 100 =

7.02 X 1,000 =

100

101

102

103

X 0.16 =

X 0.16 =

X 0.16 =

X 0.16 =

230 X 1 =

230 X 0.1 =

230 X 0.01 =

230 X 0.001 =

Test Prep Lesson 4-1Use your clicker to answer the following question:

Lesson 4-2: Decimals and Whole Numbers

3 x 0.6 =

Find the product. Draw a quick picture

2 x 0.27 =

Find the product. Draw a quick picture

Find the product. Draw a quick picture

4 x 1.3 =

4 x 0.31 =

Find the product. Draw a quick picture

Test Prep Lesson 4-2Use your clicker to answer the following question:

Lesson 4-3: Multiply with Decimals and Whole Numbers

Place the decimal point in the product

2.36X

3 708

2.9X 5

145

14.93X 6

8958

Multiply:

5 x 2.5 =

8 x 1.35 =

8 x 0.35 =

21.72 x 4 =

Test Prep Lesson 4-3Use your clicker to answer the following question:

Lesson 4-4: Multiplying Using Expanded Form

13 x 6.8 =

Multiplying place value patterns

13 x 6.8 =

Draw a model to find the product.

10 3

6

0.8

60

8

18

2.4

60

818

2.4

88.4

+

39 x 4.8 =

Multiply sing place value patterns

39 x 4.8 =

Draw a model to find the product.

30 9

4

0.8

120

24

36

7.2

120

2436

7.2

187.2

+

Test Prep Lesson 4-4Use your clicker to answer the following question:

Lesson 4-5: Multiplying Money

Test Prep Lesson 4-5Use your clicker to answer the following question:

Lesson 4-6: Decimal Multiplication

Add slides to show one tenth x one tenth

0.3 X 0.7 =0.21

Shade first

vertically

Shade second

horizontally

Count the squares that are double shaded

0.9 X 1.5 =1.35

Shade first

vertically

Shade Second

horizontally

Count the squares that are double shaded

Test Prep Lesson 4-6Use your clicker to answer the following question:

Lesson 4-7: Multiply Decimals

352X 0.4

35.2X 0.4

3.52X 0.4

241X 12

241X 1.2

24.1X .12

Test Prep Lesson 4-7Use your clicker to answer the following question:

Lesson 4-8: Zeros in the Product

0.06X 0.9

0.6X 0.9

0.04X 0.2

0.4X 0.2

0.07X 0.2

0.7X 0.2

Test Prep Lesson 4-8Use your clicker to answer the following question: