Decimals and Place Value

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Presentation transcript:

Decimals and Place Value 9.1.2012

What is the point of decimals? The decimal point!

The decimal point stays. The numbers move along the place value grid. REMEMBER If you try to move a decimal point, your maths mountain will probably tumble down and crush you. The decimal point stays. The numbers move along the place value grid.

H T U . t h

PUT IT ON YOUR PLACE VALUE GRID I like these shoes. PUT IT ON YOUR PLACE VALUE GRID £56.49

Oh my gosh. I like them so much I want to get ten pairs! £56.49

Show me the price for 10 pairs of these shoes on your place value grid. £56.49

I have a surprise Do you remember when Leona Lewis popped over to help us understand simplifying fractions? Well, her friend Beyonce got a bit jealous and said “Hey, Leona, I’m going to go to Mr Walker’s maths class to teach the children about place value.” “Nah, I’m not bothered. Stay at home” I replied. But she decided to come anyway.

MOVE THEM ALL TO THE LEFT. TIMES BY TEN MOVE THEM ALL TO THE LEFT.

Let’s make a human place value grid I’m going to need six helpers. Their names are...

LO – Decimals and place value Write your date and LO With your neatest use of the rulers (please hand them out as quick as you can _______) you need to draw a place value grid, like the ones we have been using. Create a decimal number with tens, units, tenths and hundredths and put it into your grid. Eg – 23.81 or 34.13 or 91.32 Then, underneath – draw another grid and multiply your decimals by ten.