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Flashcards in Decimals Deck (7)
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1

Multiply by 10^-n

Slides the decimal point n spaces to the left

1.34 * 10^(-3) = 0.00134

2

Divide by 10^-n

Slides the decimal n places to the right

3.55 / 10^(-2) = 355

3

How to divide by a decimal

1. Put the division in fraction form
2. Then "slide" away the decimal points - but always slide an equal number of times top and bottom of the fraction

35/1.4 -> 350(1 slide)/14(1 slide) -->7(50)/7(2) =25

4

Multiplying a positive value by a decimal from 0 to 1

Makes the values smaller

(10 * 0.5 = 5)

5

Dividing a positive value by a decimal between 0 and 1

Makes the value bigger
(10 /0.5 = 20)

6

Squaring a decimal between 0 and 1

Makes the decimal smaller (0.5^2 = 0.25)

7

Taking the square root of a decimal between 0 and 1

Makes the value BIGGER

sq. Root of 0.5 = 0.71 (approx)