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Mathematics 18 Online
OpenStudy (anonymous):

What is the value of the expression?https://static.k12.com/bank_packages/files/media/mathml_6d85625add616571d12ddc5ede49a2257775e240_1.gif

OpenStudy (butterflydreamer):

the "dot" should mean "times" :) (unless it's a decimal LOL) So we want to solve the following: \[\frac{ 9 \times 3 - 3 \times 5 }{ 4} = ?\]

OpenStudy (butterflydreamer):

Firstly, work out what 9 times 3 equals to ? and then, 3 times 5 equals to ?

OpenStudy (anonymous):

is the answer 23.25?

OpenStudy (butterflydreamer):

not quite.

OpenStudy (anonymous):

well 9x3 is 27 and 3x5 is15

OpenStudy (butterflydreamer):

corrrect! So if we plug that into our equation we have this: \[\frac{ 9 \times 3 - 3 \times 5 }{ 4 }\] \[= \frac{ 27 - 15 }{ 4 }\] Now, we want to simplify this. What does 27 - 15 = ?

OpenStudy (anonymous):

12!

OpenStudy (butterflydreamer):

excellent! :D So now we have \[\frac{ 12 }{ 4 } = ?\] 12 divided by 4 equals to?

OpenStudy (anonymous):

3

OpenStudy (butterflydreamer):

correect! :D Good job

OpenStudy (anonymous):

thanks!

OpenStudy (butterflydreamer):

no problem (:

OpenStudy (anonymous):

What is the value of the expression? (5 + 10) ÷ 5

OpenStudy (anonymous):

that would be 3?

OpenStudy (butterflydreamer):

yesss

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