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# My math project

## by 6sbradbury on Mar 14, 2012

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School

School

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## My math project Presentation Transcript

• My Math ProjectConverting Metric Units to Solve Word Problems
• We use different units for different things.
• For Example:For petrol we measure it in litres (l) and it goes in the ‘capacity’ category.
• If we want to measure how widethe road is, we would use metres (m). NOT MILLIMETRES! It’s too tiny.
• If I want to weigh how heavy a this book is, what unit of measurement would I use?Which category would it go in? Capacity/mass/length?
• For a book we use grams (g). It is in the ‘mass’ category.
• Now Let’s Do Some Converting
• Metric Units Of Measurement Chart
• Questions
• Julie has 17.5 dm (decimetres) of ribbon. For dancing she only needs 69 cm of ribbon, so she cuts 69 cm off. How many centimetres of ribbon does she have left?
• HOW?1a. Convert the decimetres to centimetres.To do this multiply 17.5 by 10.Move the digits one place value forward. 17.5 to 175cm1b. Another way of doing it is to move the decimalplace one space to the right, because you want tomultiply it by 10.17.5175 cm
• Just to make sure:*Remember BLU & LBD.
• LBD Little Big DownWhen you convert little units to big units thenumber goes down. For example: convert 23500m to km =23.5km. Same goes with other conversions such as : kg-Mg, mm- cm, hl-dal…
• BLU Big Little UpWhen you convert big units to small ones –as in km – m, m-cm, dm-cm, Mg-hg, dal (dekalitre)- ml..- the number goes up.Just like when we converted 17.5dm to cm. We got 175cm, the number went up.
• Step 22. Remember that Julie cuts off 69cm.So you simply subtract 69cm off175cm. 175 - 69 ------- 106cm.Yes you got it!The answer is 106cm.
• Now Try These!
• Miss. Rasborn had 4.7dal (dekalitres) of tea in her super- sized cup. She drank 6 litres. How much does she have left? Remember that 10l=1 dl 2. A house weighs 6.77 Mg (megagrams). How much does it weigh in hg (hectograms)? Remember that 1 Mg = 10000hg