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Multiplying by 10

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Multiplying by 10 - PowerPoint PPT Presentation


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L.O. - Multiply an integer up to 1000 by 10; understand the effect. Multiplying by 10. When we multiply by 10 we are making the number ten times bigger. x10. x10. x10. In the decimal system, each column has numbers 10 x bigger than the next one. 1000. 100. 10. 1. x10. x10. x10.

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Presentation Transcript
slide1

L.O. - Multiply an integer up to 1000 by 10; understand the effect.

Multiplying by 10

When we multiply by 10 we are making the number ten times bigger.

slide2

x10

x10

x10

In the decimal system, each column has numbers 10 x bigger than the next one

1000

100

10

1

slide3

x10

x10

x10

Let’s try it with another number!

3 0 0 0

3

3 0 0

3 0

slide4

If we multiply 6 by ten it will move into the next column

x10

We must put a 0 in the empty units column to hold the place – 6 x 10 = 60

slide5

200

20

30

3

Let’s try with some other numbers

Don’t forget to add the zero in the empty column!

23 x 10 = 230

slide6

Let’s try these together!

48 x 10 =

93 x 10 =

134 x 10 =

256 x 10 =

889 x 10 =

480

930

1340

2560

8890

Were you right?

slide7

If we multiply 6 by a hundred it will move up two columns

We must put a 0 in the empty columns to hold the place – 6 x 100 = 600

slide8

Let’s try these together!

8 x 100 =

15 x 100 =

28 x 100=

134 x 100 =

267 x 100 =

800

1500

2800

13400

26700

Were you right?

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