Friday 7 May 2010

Multiplying by 10 and 100

MrsHinsley's maths group have been multiplying by 10 and 100 and describing the effect. Then they used this skill to multiply multiplesof 10.

Can you try these at home to see if you still have the skill?

5 x 100, 19 x 10, 26 x 100, 45 x 10, 67 x 10

What about trying these

5 x 30, 7 x 80, 5 x 90, 6 x 60, 7 x 80

Can you dsescribe what happens when you multiply by 10 or a 100?

I can feel lots of housepoints in the air for anyone who has a go.

Good Luck

3 comments:

Ola said...

Dear Mrs Hinsley and Miss Speers,

The 1 question is 5x100=500
The 2 question is 19x10=190
The 3 question is 26x100=2600
The 4 question is 45x10=450
The 5 question is 67x10=670
The 6 question is 5x30=150
The 7 question is 7x80=560
The 8 question is 5x90=450
The 9 question is 6x60=360
The 10 question is 7x80=560


You just add one 0 to the answer when you times it by 10

You just add two 0 to the answer when you times it by 100

Love Ola

Natalia G said...

5x100=500
19x10=
26x100=2600
45x10=450
67x10=670
5x30=150
7x80=560
45x90=450
6x60=360
7x80=560

From Natalia G

Natalia G said...

19x10=190

I just forgotten to put the answer.