# P6 Numeracy 9th March

## Decimals - hundredths Lesson 5

It's time to subtract!

Warm-up activity

For today's warm-up, can you create different questions which have the answer 18?  Look carefully at the examples and see if you can up with at least 10 questions of your own (and don't make them too easy!).  Try to use a variety of calculations (add, subtract, multiply, divide, bracket sums, fractions, etc.) and perhaps you could create some word problems too!  Perhaps you will create some questions which look fiendishly difficult but, remember, the answer must be 18!

When you've finished, don't forget to take a photograph of your work and email it to your teacher please.  We love to see your work!

Main activity

Yesterday we were learning how to add decimal numbers with 2 decimal places (hundredths) so now it's time to look at subtraction.  Watch today's video where Mrs Bell show you how to set out your questions and then choose your level and download today's task.

Remember, if a number does not already include a decimal point, you can add a decimal point after the number and then add one or more zeros

e.g. 15 = 15.0 = 15.00 (think about money -  £15 is the same as £15.00)

If a number only has one number after the decimal point (tenths), you can add another zero after the tenths to turn it into hundredths

e.g. 25.6 = 25.60           48.2 = 48.20

EXAMPLE 1

If a question said

when I set it out, this would become

Before I begin to do my working out, I need to add a zero after the 45.6 so that there is a digit in the hundredths

EXAMPLE 2

If a question said

when I set it out, this would become

Before I begin to do my working out, I need to add a decimal point and then two zeros after the 53 so that there are digits in both the tenths and the hundredths

Reasoning activity

For today's reasoning activity, take a look at the results of a survey and see if you can explain the results.

Prodigy Maths

Head over to the Prodigy website to tackle some additional challenge questions!  This week we have added a focus on decimals so see what you can do!  Good luck!https://www.prodigygame.com/main-en/

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