PRACTICE DRILL 1 - INTEGERS

Add: 6 + 7

• 11

• 12

• 13

• 14

Answer explanation

6 + 7

positive 6 plus positive 7

Same sign, add and keep the sign.

ADD: 6 + 7 is 13.

KEEP: positive 6, positive 7

6 + 7 = 13

What is the sum of (-2) + 2?

• -2

• -4

• 0

• 2

Answer explanation

(-2) + 2

negative 2 plus positive 2

Different sign, simply subtract.

2 - 2 is 0.

What is the sum of (-4) + 4?

• 8

• -8

• 0

• 4

Answer explanation

(-4) + 4

negative 4 plus positive 4

Different sign, simply subtract.

4 - 4 is 0.

Find the sum of (-10) + 3.

• -7

• 7

• 13

• -13

Answer explanation

(-10) + 3

negative 10 plus positive 3

Different sign, simply subtract.

10 - 3 is 7.

Take the sign of the larger number.

10 is larger than 3;

10 is negative.

Then, 7 should be negative.

(-10) + 3 = -7

Find the sum of 4 + (-5).

• -9

• -1

• 1

• 9

Answer explanation

4 + (-5)

positive 4 plus negative 5

Different sign, simply subtract.

5 - 4 is 1.

Take the sign of the larger number.

5 is larger than 4;

5 is negative.

Then, 1 should be negative.

4 + (-5) = -1

Find the sum of 7 + (-2).

• -9

• -5

• 5

• 9

Answer explanation

7 + (-2)

positive 7 plus negative 2

Different sign, simply subtract.

7 - 2 is 5.

Take the sign of the larger number.

7 is larger than 2;

7 is positive.

Then, 5 should be positive.

7 + (-2) = 5

Find the sum of 6 + (-4).

• -2

• -10

• 10

• 2

Answer explanation

6 + (-4)

positive 6 plus negative 4

Different sign, simply subtract.

6 - 4 is 2.

Take the sign of the larger number.

6 is larger than 4;

6 is positive.

Then, 2 should be positive.

6 + (-4) = 2

Find the sum of 12 + (-6).

• -18

• 18

• 6

• -6

Answer explanation

12 + (-6)

positive 12 plus negative 6

Different sign, simply subtract.

12 - 6 is 6.

Take the sign of the larger number.

12 is larger than 6;

12 is positive.

Then, 6 should be positive.

12 + (-6) = 6

Add: (-5) + (-5)

• 10

• -10

• 0

• -5

Answer explanation

(-5) + (-5)

negative 5 plus negative 5

Same sign, add and keep the sign.

ADD: 5 + 5 is 10.

KEEP: negative 5, negative 5

(-5) + (-5) = -10

Add: (-20) + (-1)

• 19

• -19

• -21

• 21

Answer explanation

(-20) + (-1)

negative 20 plus negative 1

Same sign, add and keep the sign.

ADD: 20 + 1 is 21.

KEEP: negative 20, negative 1

(-20) + (-1) = -21