Fundamentals of Integers

Nine is a factor of which of the following numbers?

• 427

• 558

• 599

How do you tell if a number is divisible by 2?

• The ones digit is odd.

• The ones digit is even.

• The ones digit is 0 or 5.

• The sum of all the digits is divisible by 2.

Which of the following is composite?

• 43

• 53

• 63

• 73

• 9

• 12

• 16

• 20

Tell whether the following sum is positive, negative, or neither. 4 + (–10)

Solve.

–72 + 62 =

Solve.

8 – ( –2) = _____

Solve.

–5 x 7 = _____

Simplify using the order of operations.

( –7 x 3 + 13) ÷ 8 = _____

When adding integers, if the signs are the same you____

• subtract

• add

• multiply

• divide