# Maths

Monday 12th April 2021

LC- To understand when and how to use metric units of measure.

We are going to start this week by revising what we know about measurements.

We use measures to know how long or tall something is (length / height), how heavy something is (mass) or how full something is (volume).

Each of these have different units that are used. We NEED to know these facts, so before we go any further remind yourselves of them.

Don't worry about the imperial units for now.

Now watch the following clip on BBC Bitesize and complete the activities.

Metric units of measurement are based around 10 so the facts we need are either 10, 100 or 1000. That makes things much easier.

Let's revise.

So in this picture we see a weighing scale. We know that weight / mass is measured in g and kg and we need to know the facts.

1000g = 1 kg

So the first thing we need to do is look at the measures clue in the picture. It says kg so the scale is measuring in kg. The lines in between must be grams or parts of a kilogram.

The pointer is between 50 and 60 - so what is each little line worth?

That's right, there are 5 steps between 50 and 60 so each must be worth 2.

The pointer is therefore at 54kg.

So this example shows liquid in a jug. We need to know the facts.

1000ml = 1l

Look at the clue. It says ml so the jug is measuring ml.

It nearly reaches 1000ml or 1l but not quite. What are the increments worth?

That's right 50. So the measure is 950ml.

What are the facts of length?

10mm = 1cm

This ruler is measuring in cm.  Oh dear is isn't exactly on a cm point. What do we do now?

It is more than 1cm but less that 2 cm so we need the points in-between.

We can either say 17mm or 1.7cm.

If you think you are ok with reading simple scales then try the activities on Seesaw. If not then ask your teacher. Be careful though!

When you have completed the tasks then click the link below to take you to an online activity. There are different levels that get harder as you go along.