Lesson 2.5, For use with pages 77-81

Evaluate the expression when x = 3 and y = 17.

1. 11 + 4x

2. 6yx

Lesson 2.5, For use with pages 77-81

Evaluate the expression when x = 3 and y = 17.

ANSWER 34ANSWER 5

1. 11 + 4x

2. 6yx

Dividing IntegersDay 2

Lesson 2.5

Pages 77-81

EXAMPLE 3

Evaluating Expressions

Evaluate the expression when a = –24, b = 8, and c = –4.

a. ab

=–24 8

Substitute values.

Different signs, so quotient is negative.

b. ab c

Substitute values.

Multiply.= –192 –4

Same sign, so quotient is positive.= 48

= –24 8–4

= –3

Daily Homework Quiz For use after Lesson 2.5

Find the quotient.Evaluate the expression when k = – 36, m = 6, and n = 3.

1. mnk 2. m + n

k 3. m2 + 4n2

2k

Daily Homework Quiz For use after Lesson 2.5

Find the quotient.Evaluate the expression when k = – 36, m = 6, and n = 3.

1. mnk

ANSWERS 12

–

2. m + nk 3. m2 + 4n2

2k

ANSWERS – 4 ANSWERS – 1

Order of Operations with Integers

• 7 + -16 ÷ 4 x -2 =

• (-14 + 6) 8 =

• (-9 x- 8) ÷ (-4+8) =

• -45 ÷ [63 ÷ (-56 ÷ -8)] =

• 11 [ (15 – -3) -3] =

Order of Operations with Integers

• 7 + -16 ÷ 4 x -2 =

• (-14 + 6) 8 =

• (-9 x- 8) ÷ (-4+8) =

• -45 ÷ [63 ÷ (-56 ÷ -8)] =

• 11 [ (15 – -3) -3] =

15

-64

518

-66

Try these on your own

1. 15 + -9 3

2. -32 – 9 x -2 + 7

3. 64 (-9 + -7)

4. 41 + -14 -9 x 3

Try these on your own

1. 15 + -9 3

2. -32 – 9 x -2 + 7

3. 64 (-9 + -7)

4. 41 + -14 -9 x 3

1.12

2. -7

3. -4

4. -1

Homework

• Page 79 #18-36

GUIDED PRACTICE for Examples 2 and 3

Substitute values.

Multiply.= –42–21

Same sign, so quotient is positive.= 2

Evaluate when a = –42, b = –3, and c = 7. a bc

a bc = –42

–3 7