Goal: In the Arithmetic lesson, we learned:

• How to access the DevTools Console.
• Addition, subtraction, multiplication, and division using JavaScript operators.
• NaN means not a number but is actually considered a type of number.
• Infinity represents infinity and is also a type of number.

Begin getting comfortable with these concepts by completing the practice exercises listed below. Soon enough, they'll be second nature!

Warm Up

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Make sure you understand the following before moving on:

• What is an expression in JavaScript?
• How can we access the DevTools console?
• When might we see NaN?

Code

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Complete the following exercises to practice arithmetic in JavaScript. If you are with a pair, switch off between every section (i.e.: "Add", "Subtract", etc.) or between every prompt (e.g.: "77 to 99", "99 from 665").

Add:

• 77 to 99
• 34 to 1233
• -53 to 99

Subtract:

• 99 from 665
• 555 from 23
• 6,348,709,234 from 87,023,984,709,871,234

Multiply:

• 89 and 54
• 932 and 1,900
• -34 and 8

Divide:

• 1008 by 7
• 9,870,834,205,987 by 324
• A number by 0.
• 0 by 0.