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GCSE

IRINA

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REVISION

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LAWS OF INDIcES

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law 1

LAW 2

LAW 3

LAW 4

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Sections like this help you create order
Rounding numbers (decimals)

Identify the position of the decimal place digit you are rounding toLeave it the same if the next digit is less than 5 (this is called rounding down) But increase it by 1 if the next digit is 5 or more (this is called rounding up)

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6.9 Γ— 96 Round numbers to one significant figure 6.9 rounded to 1 significant figure is 7 96 rounded to 1 significant figure is 100 Write out the new estimated calculation 6.9 Γ— 96 β‰ˆ 7 Γ— 100 Complete the calculation using estimation 7 Γ— 100 = 700

Round to 1` sighificant figure

approximate answer

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multiplication

adding

Division

8/20 Fractions

9/20 Working with percentages

A great presentation...

10% - 2.4, 5% -1.2, 2.4 + 1.2 = 3.6

24 - 100% X= 24 x 15 : 100X - 15% X= 3.615: 10= 1.5 24 : 10= 2.41.5 x 2.4 = 3.6

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