Primary School

Relationships. Wellbeing. Achievement.

Cheetahs & Dolphins

This week we will be revising and learning more about

Doubling and Halving. 


As a warm up on a Monday and Wednesday you will be asked to fill out a Big Maths CLIC or Learn its sheet as it is very important that you keep practicing the skills we have learnt so far this year. If there are any sums you are unsure how to answer, please let us know via Teams  or email and we can give an explanation to you.


Day Activity Links

As a warm up we would like you to complete the following Learn its sheet. Try and answer as many questions as you can in the time limit!


Doubling means to make a number twice as big. Whenever we double a number the answer is always a lager number. In the past we have used diamond doubling to double numbers. Watch the video as a reminder how to diamond double and then complete the sums using the same method. You must show your working out at each stage of the diamond.

Week 1 Learn its - year 3


Remember you have 60 seconds to complete the Learn its sheet. Any you do not complete can be completed after the timer but will not go towards the score - please be honest! Only then will you see real improvement smiley


How to Diamond Double


Diamond Doubling Questions




Tuesday Yesterday you had a go at mainly doubling 2 digit numbers. Today we would like you to complete these 3 digit number doubling questions. You will not be provided with the diamond structure today so you will need to draw it for yourselves. 3 Digit doubling questions

Begin by completing the CLIC sheet. Try your best to answer all of the questions and if you are stuck on how to answer any let us know.


Today we are going to look at the opposite of doubling - halving. Whenever you halve a number you are making it smaller. Half the size that it was.  Use the diamond method to halve these numbers. Remember, where you would usually double, you will need to halve this time. Watch the video for a quick demonstration.

CLIC Test Level 3


Demo video


Halving Questions


Yesterday you were asked to halve numbers using the diamond halving method. You may have noticed that all of the numbers you were given were even numbers. That is because even numbers are much easier to half as they produce whole number answers. 


Today we are going to look at what happens when we halve odd numbers. You are going to investigate this for the first activity today. 

Activity 1:

Watch the demonstration which shows how I halve the number 3. You need to use this method to show the halves of the following odd numbers:

1, 5, 7, 9, and 13


Activity 2: 

Use diamond halving to halve the following odd numbers. Use your answers from activity 1 to help you! You will need to use the dianmond method showing all of the stages as you have done before.

a) 45

b) 67

c) 59

d) 17

e) 31

f) 47

g) 99

Activity 1 demo:


Friday Today you are going to use everything you have learnt this week to answer the following word problems on doubling and halving. Read the questions carefully to first decide whether you need to double or half. You will need to do the same working out method you have been using this week and ideally show your working out next to your answers. Take care on the last question! Doubling and Halving Problems