© 2014 22858 1 Fraction decimal switch Decimals and fractions are just different ways of showing...
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Transcript of © 2014 22858 1 Fraction decimal switch Decimals and fractions are just different ways of showing...
© www.teachitprimary.co.uk 2014 22858 1
Fraction decimal switch
Decimals and fractions are just different ways of showing the same value. A half can be written as a fraction ½ or as a decimal 0.5.
Fractions where the denominator (the bottom number) is a power of ten can easily be shown as decimals.
7/10 written as a decimal is 0.734/100 written as a decimal is 0.34
Take a look at the following fractions and decimals and try to match them to their equivalents.
Move on
© www.teachitprimary.co.uk 2014 22858 2
=
0.03 3.00.3
310
0.3Move
on
Which decimal is the same as 3/10? Click on the equivalent decimal.
© www.teachitprimary.co.uk 2014 22858 3
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 4
=
0.75 0.0757.5
75100
0.75Move
on
Which decimal is the same as 75/100? Click on the equivalent decimal.
© www.teachitprimary.co.uk 2014 22858 5
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 6
=
9/10 9/1001/9
0.09
9/100Move
on
Which fraction is the same as 0.09? Click on the fraction.
© www.teachitprimary.co.uk 2014 22858 7
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 8
=
45/100 1/4545/1000
0.045
45/1000Move
on
Which fraction is the same as 0.045? Click on the fraction.
© www.teachitprimary.co.uk 2014 22858 9
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 10
Fraction decimal switch – getting trickier!
Remember when changing decimals to
fractions0.4 is the same as 4/10BUTYou may need to show the fraction in its simplest form, so find a number that divides into the numerator and the denominator.2 divides into 4 twice and into 10 five times so4/10 becomes 2/5!
or when changing fractions to decimalswhen the denominator is not a power of ten.Take 4/5 for example. You need to ‘change’ the denominator to a power of ten. 5 times by 2 gives 10 but now you need to do the same to the numerator so 4 times 2 gives 8. 4/5 is the same as 8/10 which is 0.8 as a decimal, phew!!! Move
on
© www.teachitprimary.co.uk 2014 22858 11
=
0.13 0.50.26
13/50
0.26Move
on
Which decimal is the same as 13/50? Click on the decimal.
© www.teachitprimary.co.uk 2014 22858 12
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 13
=
1/25 1/41/5
0.25 1/4Move
on
Which fraction is the same as 0.25? Click on the fraction.
© www.teachitprimary.co.uk 2014 22858 14
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 15
=
0.4 0.040.8
8/20 0.4Move
on
Which decimal is the same as 8/20? Click on the decimal.
© www.teachitprimary.co.uk 2014 22858 16
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 17
=
1/85 17/2017/50
0.85 17/20Move
on
Which fraction is the same as 0.85? Click on the fraction.
© www.teachitprimary.co.uk 2014 22858 18
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 19
=
0.5 0.30.15
15/30
0.5Move
on
Which decimal is the same as 15/30? Click on the decimal.
© www.teachitprimary.co.uk 2014 22858 20
Sorry you’re wrong
Try againHINT:
1/10 is 0.1 as a decimal, 1/100 is 0.01 as a decimal and 1/1000 is 0.001
Try again
© www.teachitprimary.co.uk 2014 22858 21
Now have a go on your own and see if you are a bronze, silver or gold
fraction decimal switcher!