# P6 Numeracy 22nd February

## Decimals - tenths Lesson 5

Today we begin by revising our previous learning and then we are looking at multiplication by a single digit and by 10.

Warm-up activity

This week's focus is on our multiplication and division facts.  Every day this week we are going to complete a Numeracy Ninja challenge where all the tables have been mixed up and it is your job to work out the missing number in each calculation.

There are 60 questions to complete each day.

Why don't you set a stopwatch on your phone or tablet and see how quickly you can complete today's challenge?  Write down your time and then, when you do tomorrow's challenge, you can try to beat today's time.  If you haven't finished after 15 minutes, stop and spend another 5 minutes revising your tables please.

If you choose the higher level challenge, you are looking at all the tables from 2 X to 12 X plus their division facts.

If you're not so sure about your tables, choose the lower level challenge.  Each day we will concentrate on a different table and today we are looking at the 2 X table.  Download the Multiplication Tables Factsheet and spend a couple of minutes practising counting forwards and backwards in 2s and looking at the related division facts.  Then download the 2 X table challenge and try to complete it without any help.  Lots of questions are repeated throughout the worksheet to help to reinforce your learning.

Main activity

Today we are going to revisit our work on decimals, revise adding and subtracting tenths and then begin looking at multiplication.  Watch today's video where Mrs Bell talks us through today's activities and then download the activities below.

In part one, we are working mentally

e.g. 5 X 0.9 = 5 X 9 tenths = 45 tenths = 4.5

In part two, we are working vertically

e.g.

Choose your level and do your best to complete the calculations.  Set them out like the question above.  Don't forget to include the decimal point in your answers!

Your final questions are about multiplying by 10.  As we learned before Christmas, when we multiply by 10, each digit moves one place to the left so the number that was in the units column moves to the tens, the number that was in the tens column moves to the hundreds, etc. and we place a zero in the empty space

Th H T U                         Th H T U

e.g.                9         times 10 =         9 0

1 8         times 10 =      1 8 0

4 5 2         times 10 =   4 5 2 0

When multiplying a decimal number by 10, the same rule applies so the digit that was in the tenths column moves into the units.  We DO NOT move the decimal point!

Th H T U . t                   Th H T U . t

e.g.                 1 . 5  times 10 =         1 5 . 0   (or 15)

5 6 . 3  times 10 =      5 6 3 . 0   (or 563)

3 8 2 . 6  times 10 =   3 8 2 6 . 0   (or 3826)

Reasoning activity

Challenge yourself by tackling today's reasoning activity which is all about perimeter!  Don't forget to explain your thinking to an adult

Prodigy Maths

Have you visited the Prodigy website yet?  Lots of you have been making fantastic progress - well done!

Home | Prodigy Education (prodigygame.com)

If you haven't started yet, go back to our P6 Home Learning page to find all the details about usernames and passwords and then why don't you begin playing Prodigy today?  Prodigy is great fun and a super way to revise your Maths facts.  It works out what level you are at in Maths and gives you questions set at your level.

Top