Decimals

Place Value

100

In 9.81, what place is the 8 in?

Tenths

200

Write the decimal for 4/10.

0.4

300

In 8.46, what place is the 8 in?

Ones

400

What number is 15tenths?

1.5

500

What number is 27 tenths?

What number is the ones and what numbers is the tenths?

2.7

ones - 2 and tenths = 7

Comparing Decimals

100

Compare these decimals with <, >, or =

0.2 _____ 0.4

<

200

Compare these decimals with <, >, or =

1.8 _____ 0.8

>

300

Compare these decimals with <, >, or =

0.202 _____ 0.2023

<

400

What is the missing numbers in this pattern?

1.3, 1.6, ____, 2.2, ____

1.9 and 2.5

500

Order the decimals from least to greatest.

1.9, 0.2, 2.5, 1.3, 0.5

0.2, 0.5, 1.3, 1.9, 2.5

Adding Decimals

100

Add these decimals. 0.3 + 0.2

= 0.5

200

Add these decimals. 1.3 + 1.5

2.8

300

Add these decimals.0.8 + 1.5

2.3

400

Add these decimals. 4.6 + 2.9

7.5

500

Add these decimals. 5.2 + 3.11

8.31

Fractions and Decimals

100

What is 0.3 as a fraction?

3/10

200

What is 8/10 as a decimal?

0.8

300

Is 6/10 and 3/5 the same?

Yes they are. They are equivalent fractions.

400

What is 4/5 as a decimal?

Remember - it has to be out of /10

So 5 x 2 = 10, what you do to one side, you must do to the other, so then 4 x 2 = 8

So 4/5 = 8/10

500

What is 10/10 as a decimal? Is there more than one way of writing this number?

1.0

Yes 1 and 1.0 mean the same thing

Subtracting Decimals.

100

Subtract these decimals.

3.5 - 2.1

1.4

200

Subtract these decimals.

2.1 - 0.1

2

300

Subtract these decimals.

2.3 - 0.7

1.6

400

Subtract these decimals.

1.7 - 0.8

0.9

500

Subtract these decimals.

2.54 - 1.82

0.72