Maths Day Three Convert grams and kilograms Dont

Maths ~ Day Three Convert grams and kilograms Don’t forget to click on the ‘Present’ tab to start.

MORNING YEAR 4! Remember the slide presentation is just to guide you through the learning. It will ask you some questions but they are talking points. ON THE GREEN SLIDES ARE THE QUESTIONS YOU WILL NEED TO ANSWER IN YOUR LEARNING JOURNALS!

Write the date and the title neatly into your Home Learning Journal.

How many grams are there in 1 kilogram?

How many grams are there in 1 kilogram? There are 1000 grams in 1 kilogram.

Now we know there are 1000 grams in 1 kilogram, how do we convert kilograms to grams?

Now we know there are 1000 grams in 1 kilogram, how do we convert kilograms to grams? We multiply the kilograms by 1000. A place value grid can help us here.

How many grams are there in 0. 7 kg? 0. 7 x 1000 = We know when we multiply by 1000 the digits move 3 places to the left 0. 7 x 1000 = 700 g

Lets try another one… How many grams are there in 1. 8 kg? What calculation do you need to do to work this out?

How many grams are there in 1. 8 kg? What calculation do you need to do to work this out? 1. 8 x 1000 = Use a place value grid to help you.

How many grams are there in 1. 8 kg? 1. 8 x 1000 = We know when we multiply by 1000 the digits move 3 places to the left 1. 8 x 1000 = 1800 g

Lets try another one… How many grams are there in 2. 5 kg? What calculation do you need to use to work this out?

How many grams are there in 2. 5 kg? What calculation do you need to use to work this out? 2. 5 x 1000 = Use a place value grid to help you and remember when you multiply by 1000 the digits move 3 places to the left.

How many grams are there in 2. 5 kg? 2. 5 x 1000 = 2500 g Well done!

Chunk 1. Now your turn: Convert these measurements into grams: a)2. 7 kg b)0. 8 kg c)3. 65 kg d)0. 56 kg

Chunk 1. Now your turn: Convert these measurements into grams: a)2. 7 kg = 2700 g b)0. 8 kg = 800 g c)3. 65 kg = 3650 g d)0. 56 kg = 560 g

Now we know how to convert kilograms to grams let’s have a look at converting grams to kilograms. To convert grams to kilograms we divide by 1000. Another place value grid will help us here.

How many kilograms make up 2700 g? 2700 ÷ 1000 = We know when we divide by 1000 the digits move 3 places to the right 2700 ÷ 1000 = 2. 7 kg

How many kg make up 3400 g? What calculation will you use to work this out?

How many kg make up 3400 g? What calculation will you use to work this out? 3400 ÷ 1000 = Now work it out using a place value grid to help you.

How many kg make up 3400 g? What calculation will you use to work this out? 3400 ÷ 1000 = We know that when we divide by 1000 the digits move 3 places to the right 3400 ÷ 1000 = 3. 4 kg

CHUNK 2 Complete this grid in you book. Remember to use a place value grid.

CHUNK 2 Answers. 1. 4 kg 400 g 3. 4 kg 2400 g 1. 49 kg 490 g 5. 4 kg 4400 g 3. 49 kg 2490 g Remember to use a place value grid. 5400 g 5. 49 kg 4490 g 5490 g

Why might this be tricky?

Why might this be tricky? Because they are in different measurements. How could we make it easier?

How could we make it easier? We can convert them to the same measurement.

You can convert either side… we are going to convert the grams into kilograms. What calculation do we need to do?

We are going to convert the grams into kilograms. What calculation do we need to do? 2150 ÷ 1000 = And the answer is…. .

We are going to convert the grams into kilograms. 2150 ÷ 1000 = 2. 15 kg Now which symbol will you use? Remember < = less than and > = greater than.

< 2. 15 kg 2. 15 kg is less than 2. 2 kg

Let’s try another one. What do you need to do first?

What do we need to do first? That’s right we need to convert them to the same measurements.

We are going to convert the kilograms to grams. What calculation do we need to do?

We are going to convert the kilograms to grams. What calculation do we need to do? 0. 9 x 1000 = And the answer is…. . .

We are going to convert the kilograms to grams. 0. 9 x 1000 = 900 g Now which symbol will we use?

< 900 g is less than 7000 g

CHUNK 3

CHUNK 3 Answers. . > > > any number less than 0. 74 any number less than 8000

Extra challenge. . Tip: you will need to convert to the same measurement first

Extra challenge. . 10. 5 kg or 10500 g 0. 8 kg or 800 g 6. 4 kg or 6400 g 0. 6 kg or 600 g