Number: Rounding Off - offline version

Objectives:

• Know how to round to the nearest significant figure.



• Know how to estimate answers to problems involving decimals.

National Curriculum:

• AT2 level 4 and 6

Resources required:

• Worksheet on Rounding off



• Pens and pencils



• Homework sheet

Teaching activities:

Mental Starter

Activities

• Hand the worksheet out.
  
  
• Discuss what numbers you need to put on the scale. More examples may need to be done on the board.
  
  
• Pupils work through the exercise.
  
  
• 23
  Statements to make: "If we are rounding to the nearest 10 the 10's go on the scale, it will either stay the same or go up. So 20 or 30."
  
  
• 42.16
  "If we are rounding to one decimal place we put one decimal place on the scale, it will either stay the same or go up so 42.1 or 42.2.

Extension

• Rounding to significant figures.

Plenary

• Ask everybody quick fire questions or prepare a card chase game.

Suggested homework:

• A pre-prepared sheet of questions, with number work they have to practise.