Rounding Numbers

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Rounding Numbers - PowerPoint PPT Presentation

Rounding Numbers. 1. 36 456. 45.78. 12. 2. A number that stands on its own. A number without little bit more. What is a whole number?. Whole Numbers. Mixed numbers. 1. 100. 1 302. 12.32. Rounding to nearest whole number. 2.1. 3.6. 4.5. 12.3. 24.15. Division.

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Rounding Numbers

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Presentation Transcript

Rounding Numbers

1

36 456

45.78

12

2

A number that stands on its own.A number without little bit more.

Whole Numbers

Mixed numbers

1

100

1 302

12.32

2.1

3.6

4.5

12.3

24.15

Division

Learn to know when to round up or round down when answering division questions.

There are 150 children and teachers going on a theatre trip. They need to travel from the school to the theatre in coaches. Each coach can carry 60 children. How many coaches will be needed?

Round up or round down?

150 ÷ 60

= 2.5

3 coaches needed

Round up

I have saved £234. A train ticket costs £52. How many tickets can I buy.

Round up or round down?

£234 ÷ 52

= 4.5 tickets

4 tickets only.

Round down

I have 134 oil lamps. How many boxes will I need to carry all the lamps, if each box can carry 8 lamps.

Round up or round down?

134 ÷ 8

= 16.75 boxes

17 boxes.

Round up

I have 240 cakes. One box holds 52 cakes. How many boxes would I need for all the cakes.

Round up or round down?

240 ÷ 52

= 4.615384

5 boxes

Round up

1. I have saved £360. A train ticket costs £50. How many tickets can I buy?

Round up or round down?

£360 ÷ 50

= 7.2

7 tickets

Round down

2. A coach carries 72 people. How many coaches are needed to transport 378 people on a trip to watch a football match?

Round up or round down?

378 ÷ 72

= 5.25

6 coaches

Round up

3. 297 apples fall off the tree and need to be packed in boxes. 44 apples can fit in a box. a) How many full boxes will there be? b) How many boxes will be needed to carry all the apples?

Round up or round down?

297 ÷ 44

= 6.75

6 full boxes

Round down

7 boxes altogether

Round up

Round up or round down?

278 ÷ 8

= 34.75

34 puppets

Round down

5. A robot in a factory sews buttons on coats. Each coat has 7 buttons. The robot breaks down after sewing 328 buttons. How many coats are finished?

Round up or round down?

328 ÷ 7

= 46.857142857143

46 coats

Round down

A school has 250 children and they are all going on a trip together. A coach can hold 52 children. How many coaches will they need?

Round up or round down?

250 ÷ 52

= 4.807692307692

5 Coaches

Round up

I have 5 metres of ribbon and I need lengths of 865mm for the Summer Fayre stalls. How many of these lengths can I get from the ribbon?

Round up or round down?

5000 ÷ 865

= 5.780346820809

5 lengths

Round down

5000 football fans are going to a match. Each stand of the football stadium holds 865 people. How many stands will the fans need.

5000 ÷ 865

= 5.780346820809

6 stands

Round up