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Presentation on theme: "Type your name and send:"— Presentation transcript:

1 Type your name and send:
Rounding LO: Understand how to round numbers to the nearest 10, whole number or decimal place. Type your name and send: Next

2 Starter – order decimals
Discuss? Which value is the bigger? 4.17km 0.84 0.325 0.345 0.72 11.7 7.30cm 11.57 7.03cm 4.162km Next

3 Starter – order decimals
Discuss? Put these in order, smallest first. 0.213 0.231 0.132 0.123 0.312 Next

4 What is the value… 3.4 Answer = Next

5 What is the value… 5.2 Answer = Next

6 4.8 What is the value… 3 4 5 Answer =
4.8 Answer = Next How do you know when to round up or down?

7 Round the following number to 1dp
If this number is a 0, 1, 2, 3 or 4 we don’t have to do anything else and we have our answer. Now look at the number immediately after where we stopped highlighting 6.348 Firstly, highlight the number to the first number after the decimal point So we have 6.3 But is this the answer? Next

8 Round the following number to 1dp
Next

9 What if the red number was a 5, 6, 7, 8 or 9?
Lets look at an example Next

10 Round the following number to 1dp
If this number is a 5, 6, 7, 8 or 9 we increase the last digit by one. Now look at the number immediately after where we stopped highlighting 9.2721 Firstly, highlight the number to the first number after the decimal point So we have 9.2 But is this the answer? So 9.2 becomes 9.3 Next

11 Round the following number to 1dp
Next

12 Rounding to the nearest whole number
Is the arrow nearer to 6, 7 or 8? If it is halfway between, then round UP Next

13 Round these city populations to the nearest million
Mexico City million Next

14 Round these city populations to the nearest million
Mexico City million Sao Paulo million Next

15 Round these city populations to the nearest million
Mexico City million Sao Paulo million Tokyo million Next

16 Round these city populations to the nearest million
Mexico City million Sao Paulo million Tokyo million New York million Next

17 Rounding to the nearest 10
Is the arrow nearer to 20, 30 or 40? If it is halfway between, then round UP Next

18 What is the volume of liquid to the nearest 10 millilitres?
100 90 80 70 60 50 40 30 20 10ml Next

19 What is the volume of liquid to the nearest 10 millilitres
100 90 80 70 60 50 40 30 20 10ml Next

20 What is the volume of liquid to the nearest 10 millilitres
100 90 80 70 60 50 40 30 20 10ml Next

21 Rounding to the nearest 100
Is the arrow nearer to 400 or 500? If it is halfway between, then round UP Next

22 What is the mass of flour to the nearest 100g?
200 400 600 grams Discuss? Next Estimate the value to the nearest 10g

23 What is the mass of flour to the nearest 100g?
200 400 600 grams Discuss? Next Estimate the value to the nearest 10g

24 What is the mass of flour to the nearest 100g?
200 400 600 grams Discuss? Next Estimate the value to the nearest 10g

25 Rounding to 1 decimal place
What value is the arrow pointing at? Is it nearer to 1.4 or 1.5? Discuss? Next

26 Rounding heights & distances
Round each of these winning heights & distances to the nearest whole number Round them to one decimal place (1 d.p.) Women’s events High Jump 2.09 m Long Jump 7.48 m Shot-put 21.95 m Discus 76.80 m Javelin 80.00 m Discuss? Next

27 Take Care! 3.5 3 (not 4) Round 3.48 to 1 d.p
Round 3.48 to the nearest whole number 3 (not 4) Next

28 LO: rounding numbers to decimal places
I need more practice to help me understand this and I made lots of mistakes. B I am beginning to understand this and I got many of them correct. C I really understand this and I got most of them correct. Last Page


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