Upload
others
View
2
Download
0
Embed Size (px)
Citation preview
Ignore the decimal point and think of these numbers as whole numbers; 1,506 1,560 & 800 You can see that 800 is smallest & 1,560 is biggest
(decimal point moves 1 place to the right)
(decimal point moves 2 places to the right)
(decimal point moves 3 places to the right)
(decimal point moves 2 places to the left)
(decimal point moves 3 places to the left)
(decimal point moves 1 place to the right)
=
=
Also = 3/12, 4/16, 5/20, 6/24 etc.)
Also = 3/6, 4/8, 5/10, 6/12 etc.)
= Also = 3/15, 4/20, 5/25, 6/30 etc.)
To add, subtract or compare sizes of fractions, they must all have the same denominator
>
> =
x5
x5
+ x2
x2 = + =
+ =
- = 35
28 - 20 =
35
8
Smiley face method (Orange lines means multiply)
Every 9 makes a whole. 44 is 4 lots of 9 = 36 This leaves 44-36 = 8 left over So as a mixed number this fraction is:
4
Fractions into decimals into %:
⅖ = 2 ÷ 5 = 0.40 = 40% (Move the decimal point 2 places) 3/8 = 3 ÷ 8 = 0.375 = 37.5%
10% of £50 = £50 ÷ 10 = £5 Therefore 40% is 4 x 10% = 4 x £5 = £20 With a calculator: 40% = 0.4 (move the decimal point 2 places to the left)
£50 x 0.4 = £20
0.2
Alternative method: 10% = 999.99 20% = 999.99 x 2 = 1,999.98