Negative numbers; count through zero - Teaching Presentation - Year 5

This presentation provides two days of teaching that cover the objectives:

• Compare and order negative numbers.
• Count back in steps through zero
  It includes starter activities, whole class teaching, group activities, practice sheets and mastery questions. It can be used on a variety of interactive whiteboards.

Day 1 Teaching
Discuss contexts in which we use negative numbers: temperature, depth, debts, etc. Launch the ITP Number Line. Choose –20 to 20 range. Click so that the numbers are not displayed on the tags. Children identify numbers. Mark –2 and –8. What numbers are in-between? Repeat with +3 and –4. Ask children to write a number between –15 and 15 on a whiteboard. Gradually create a human number line, with children negotiating their position in the line.

Day 2 Teaching
Show a horizontal counting stick. Identify the end as –10. Count from this to +10. Then start at –40 and count in steps of 5. Start at –100 and count in 10s. Start at –200 and count in 25s. Repeat, counting back and forth across 0 in different size steps. Discuss situations in ‘real life’ where these sorts of subtractions are possible, e.g. falls in temperature, descending below sea level, or being overdrawn at the bank.

This teaching is part of Hamilton’s Year 5 Place Value block. Each Hamilton maths block contains a complete set of planning and resources to teach a term’s worth of objectives for one of the National Curriculum for England’s maths areas.