Describe how you would multiply 4 x 300 using mental math
2 answers:
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Answers are in bold.
<em><u>For the first one:</u></em>
The total area of both shaded and unshaded portions is equal to , which simplifies to
. The area of the middle white portion is
, which simplifies to
. To find the area of the shaded portion, we do
. Combining like terms, we get
as our expression for the area of the shaded portion of the first rectangle.
<u><em>For the second one:</em></u>
The total area of both shaded and unshaded portions is equal to , which simplifies to
. The area of the middle white portion is
, which simplifies to
. To find the area of the shaded portion, we do
. Combining like terms, we get
as our expression for the area of the shaded portion of the second rectangle.
Answer:
I decided to take a picture since it was easier for me that way. Hope you don't mind. Oh and if my number line isn't clear, the answer is the first number line
