Nadia David

Mathematics

6 January, 09:57

Bennett tried to solve exercise 1 a few different ways. Which of his methods are correct? Of the other methods, which makes the most sense to you? Explain

A. 5% sales tax means that for every dollar you spend, you need to pay a nickel in tax. If you buy a nickel tax. If you buy something for $21, you need to pay 21 nickels in tax.

B. You can set up a promotion and solve for the missing value.

$.05 = x < - - (These are fractions)

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$1.00 $21.00

C. If you know that 10% of $21 is $2.10, so 5% should be half of $2.10

D. 5% is equal to 1/20. To find the amount of tax on $21, find $21 : 20

E. 1% of $21.00 is $0.21 so 5% of $21.00 is 5 x $ 0.2