Place Value – Objectives

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Presentation transcript:

Place Value – Objectives Know what each digit represents in numbers up to 100,000. Use place value to add and subtract. You will need: an IWB calculator, e.g. the one at http://www.crickweb.co.uk/ks2numeracy-tools.html, and mini whiteboards. © Hamilton Trust Keeping Up Term 2 Week 6 Day 2

Place Value – Direct Teaching Remember the value of each digit using a Place Value chart… 25837 ones tens hundreds thousands ten thousands © Hamilton Trust Keeping Up Term 2 Week 6 Day 2

Place Value – Direct Teaching Or… a Place Value grid What is the value of the 2? 25837 10000s 1000s 100s 10s 1s 2 5 8 3 7 Move the pointing hand to discuss the value of different digits. © Hamilton Trust Keeping Up Term 2 Week 6 Day 2

Place Value – Direct Teaching What number must be subtracted to ‘zap’ the 5 (turn it into a zero)? Enter the number 25,837 into an IWB calculator [click on the hyperlinked image, or go to e.g. http://www.crickweb.co.uk/ks2numeracy-tools.html Use the calculator to subtract numbers they suggest, drawing out that 5000 must be subtracted as the digit 5 represents 5000. © Hamilton Trust Keeping Up Term 2 Week 6 Day 2

Place Value – Student Activity Show me… What number must be subtracted to ‘zap’ the 5s? 48,592 52,834 87,350 45,532 25,355 55,635 Ask students to discuss in pairs, then write on their own whiteboards. © Hamilton Trust Keeping Up Term 2 Week 6 Day 2

Place Value – Direct Teaching What number must be added to make all the digits a 5 ? Click on the hyperlinked image, or go to e.g. http://www.crickweb.co.uk/ks2numeracy-tools.html. Use the calculator to add numbers they suggest, drawing out that 200 must be added as the digit 3 represents 300. © Hamilton Trust Keeping Up Term 2 Week 6 Day 2

Place Value – Student Activity Show me… What number must be added to make 55,555? 43,555 52,515 53,455 Students use mini whiteboards to show you their answers. © Hamilton Trust Keeping Up Term 2 Week 6 Day 2

Place Value – Individual Practice Add to make 77,777 the 3s 43,609 13,037 32,353 73,747 17,075 34,621 The calculations involve changing more digits the further down each set you go. © Hamilton Trust Keeping Up Term 2 Week 6 Day 2