Hi... I am Dec.

I am a Dalmation with ten spots!

I would love to learn more about decimals. Will you help me?

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What are decimals?Decimals are parts of whole things.

They are a little like fractions,but we write them in a different way.

Decimal numbers have a decimal point.This separates the whole numbers (on the left)

from the part numbers (on the right).

41219

687409

Decimal Points

Whole Numbers Part Numbers

.

.

.

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Number lines can help usto compare decimals.

0 1 2 3 4 50.3 0.8 ? 2.4 3.2 ? ?

What decimal numbers are the red arrows pointing to?

1.3 1.4 1.5 1.6 1.7 1.81.32 ? 1.47 1.55 ? 1.73 ?

This number line shows units, tenths and hundredths.

The number line below shows units and tenths.

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Adding and subtracting decimals is just like

adding and subtracting whole numbers.

Just remember to line up the decimal points...

... and don’t forget to write the decimal point in your answer!

5 . 63 . 72+

1

5 . 63 . 72+

8 . 732 . 52-

9 . 32 6 . 21?

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A1 A2

A3 A4

What is double1.2?

What is1.5 x 10?

Put these decimalsin order of size

(smallest to largest):3.8, 2.9, 3.1

Round 3.7 to the nearest

whole number.

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A5 A6

A7 A8

What is the value of the tenths digit in

5.9?

Use < or > to compare the size of

these numbers:6.5 4.1

What number is this arrow pointing to?

What is1.4 + 2.3?

0 1?

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A9 A10

A11 A12

What is0.64

written as a percentage?What is

479 ÷ 100?

What is4.8 ÷ 4?

What is0.44

written as a fraction?

Th H T U . t h

3 0 1 5 . 2 7www.teachingpacks.co.uk©

Thou

sand

s

Hun

dred

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Uni

ts

Tens

Dec

imal

Po

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Tent

hs

Hun

dred

ths

1. 0.50.6+

2. 0.60.7+

3. 0.30.5+

4. 0.40.9+

5. 0.40.2+

6. 0.70.7+

7. 0.10.5+

8. 0.80.6+

9. 0.70.2+

10. 0.90.8+

11. 0.50.8+

12. 0.60.2+

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Can you add these decimals quickly and accurately?

A

1. 0.50.61.1

+2. 0.6

0.71.3

+3. 0.3

0.50.8

+

4. 0.40.91.3

+5. 0.4

0.20.6

+6. 0.7

0.71.4

+

7. 0.10.50.6

+8. 0.8

0.61.4

+9. 0.7

0.20.9

+

10. 0.90.81.7

+11. 0.5

0.81.3

+12. 0.6

0.20.8

+

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AAnswers

1. 455.12710.40+

2. 173.13219.77+

3. 562.40243.93+

4. 469.4363.61+

5. 458.66423.87+

6. 976.88267.20+

7. 245.61413.10+

8. 710.19250.23+

9. 117.86474.10+

10. 355.07489.79+

11. 862.88825.69+

12. 90.10642.45+

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Can you add these decimals quickly and accurately?

H

1. 455.12710.40

1,165.52+

2. 173.13219.77392.90

+3. 562.40

243.93806.33

+

4. 469.4363.61533.04

+5. 458.66

423.87882.53

+6. 976.88

267.201,244.08+

7. 245.61413.10658.71

+8. 710.19

250.23960.42

+9. 117.86

474.10591.96

+

10. 355.07489.79844.86

+11. 862.88

825.691,688.57+

12. 90.10642.45732.55

+

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HAnswers

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