MATHS

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  • Created by: holly2001
  • Created on: 23-03-15 13:19
Simple % 38% of 90
0.38 x 90 = 342
1 of 17
Increase £30 by 2%
100 + 2 = 102% 1.02 x30 = £30.60
2 of 17
Decrease £72 by 12%
100 - 12 = 88% 0.88 x 72 = £63.36
3 of 17
Repeted changes
Use the multipliers use a power if we use the same multipliers more than once.
4 of 17
£2500 is invested in the bank an intrest rate of 3% for 34 years. How much do you have at the end?
100+3=103 1.03 to the power of 4 x 2500 = 2813.7720 = £2813.77
5 of 17
Reverse Perceentage
Look out for Key words BEFORE, ORIGINAL, use the mutiplier that Increase, decrease that has happend.
6 of 17
After a pay increase at 3% Anita earns £5.15 an hour. What did she earn before?
100+3=103% 1.03 x x = 5.15 x= 5.15 = 1.03 x=£5
7 of 17
One number as a percentage of another write 82 as a percentage of 75
82/75 x100 = 109.333... = 109%
8 of 17
Profit/loss
% = actual profit/loss dicide by original x100
9 of 17
Price index
The index in the base year is 100. The index in the future is the percentage compared with the base year.
10 of 17
Terminating decmals ....
STOP
11 of 17
Recuring decimals ....
CARRY ON FOREVER IN A REPEATING PATTERN
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Converting fractiond to decimals
Divide the number by thr denominator. Stop when wither : You have no remaninder (Terminating) or you stop because a pattern in the answer is starting to occur.
13 of 17
Rounding to 1 significant figure
Only 1 number which isn't a )(That has to be the first number)
14 of 17
375 ..
400
15 of 17
0.73
0.7
16 of 17
Estimation
We estimate by rounding to one significant figure
17 of 17

Other cards in this set

Card 2

Front

100 + 2 = 102% 1.02 x30 = £30.60

Back

Increase £30 by 2%

Card 3

Front

100 - 12 = 88% 0.88 x 72 = £63.36

Back

Preview of the back of card 3

Card 4

Front

Use the multipliers use a power if we use the same multipliers more than once.

Back

Preview of the back of card 4

Card 5

Front

100+3=103 1.03 to the power of 4 x 2500 = 2813.7720 = £2813.77

Back

Preview of the back of card 5
View more cards

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