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Numeracy

Numeracy

 

Here are suggested activities linked to your weekly overview for Week 9 (01.06.20). This week's focus is Decimals. We know this is a new topic, but hopefully the videos will help. Spend some time watching the videos and looking through the PPTs which will help you through this area of Numeracy. For the lessons, you’ll have a few worksheets you can complete linked to your Numeracy group. Please make sure you choose the correct activity. You do not need to do all the worksheets for all the groups...just your group. Remember to check out Studyladder too where you will find a Decimals POD to work on. 

 

If you need any help or further explanations... please email your teacher. We are only too happy to help. laugh

Numeracy Lesson 1 – Introduction to Decimals (Tenths)

 

What is a decimal?
At the very start of P5, we did some work on place value and looked at the columns of units, tens, hundreds and thousands. When we thinking about place value in the number system, there is something special which follows the unit’s column. It is the decimal point. A decimal point NEVER moves and it always comes after the unit’s column. The column which comes after the decimal point is called the ‘tenths’ column and it links nicely with our fraction work from last week.  

5 Fraction Aid - Stop watching at 4:05 please!

matching fractions to deciamals

Count on or back in tenths and locate tenths on a number line

An Introduction to Tenths

Matholia educational maths video on introduction to tenths. For more maths videos for kids and loads of interactive content, visit matholia.com.

Year 3 Lesson: Tenths to Decimals

Want to do some practice questions now? Visit http://mathsonline.com.au to access a bank of questions. You can also access the maths lesson summary and works...

So, 3/10 can be written in another way... e.g. 0.3 (no units and three tenths)

 

  • The dot in between the 0 and the 3 is called the DECIMAL POINT and we use it to separate the units from the tenths.
  • We always write in the 0 before the decimal point because it reminds us that the whole number is less than one.
  • We say this number as "nought point three" or "zero point three".
  • 10/10 is the same as 1 whole or 1 unit. So 14/10 would be 1.4
  • An important fact to remember is 5/10 = 0.5 and that is the same as 1/2 (half). This comes from our equivalent fractions. 5/10 is the same as 1/2. You'll need to know this for P6.

 

If you think you’ve got this…why don’t you try playing the following games to help you practice:

http://www.sheppardsoftware.com/mathgames/decimals/DecimalModels10.htm

Numeracy Lesson 2 – Recap on shading decimals and ordering decimals

 

Now that we’ve learned a little bit about decimals, we’d like you to now think about ordering decimals and comparing them. Look at the following PPT just to recap decimals.

If we had the following:

8.1           6.3            5            1.9             0.6

Let’s think about ordering these decimals. The key is to think about the unit’s column. We have one tricky number here in ‘5’. Let’s think about what this means. It is 5 units, so it can also be written as 5.0. This is SO important to remember. So if we were ordering the numbers from smallest to largest, it would be:

 

0.6              1.9               5                 6.3              8.1

 

Have a go at playing the following games to practice this new skill. Practice makes perfect.

 Click ordering and decimals 1 place

https://www.topmarks.co.uk/ordering-and-sequencing/caterpillar-ordering

 Up to 10 (1dp)

https://www.topmarks.co.uk/ordering-and-sequencing/coconut-ordering

Numeracy Lesson 3 – Adding and Subtracting mentally

 

Adding and subtracting decimals can be tricky, but you need to take your time and think carefully. It’s important to remember:   10/10 = 1 whole or 1 unit
      

So if I was adding:  0.4 + 0.4 + 0.3
If we think about this in tenths, we have 11 tenths which is written as 1.1. A sneaky way of thinking about it is adding 4,4 and 3 which gives you 11 and then remembering that you need the decimal point in between, but this can get a little confusing. As we’ve said all along, the best way to practice. Give the following games a go, before trying your worksheets for today.

 

http://www.numbernut.com/fractions/activities/decimal_numline_add10th.html

http://www.numbernut.com/fractions/activities/decimal_quiz_sub10th.html

http://www.sheppardsoftware.com/mathgames/decimals.htm

 

Take your time with these worksheets today and read the symbols, questions carefully.

Lesson 4 – Adding and Subtracting tenths using vertical addition

 

Adding and subtracting tenths using vertical addition/subtraction is just like adding TU numbers. Just remember to keep the decimal point in your answer.