How do you evaluate (3\times 5)+(3\times 4.5)+(11\times 3.5)?

1 Answer
Mar 3, 2018

The expression works out to 68

Explanation:

Evaluate (3×5)+(3×4.5)+(11×3.5)

This is an Order of Operations problem

First do the multiplications

(3×5)+(3×4.5)+(11×3.5)
color(white)(m)(15)   +    (14.5)   +     (38.5)

Now you can combine the addends

color(white)(.m) 15
color(white)(.m) 14.5
color(white)(.)+   38.5
――――
color(white)(.n.) 68

Answer
color(white)(..,)68

color(white)(mmmmm.)――――

Check

Check by estimating

This is almost the same as
15 + 15 + 40 = 70

This estimate is close to the actual answer, so 68 is probably correct.

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