Chapter 6

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Calculating with letters

Simplifying products

Simplify.

1. 18ab
2. 18ba
3. 45ab
4. 45ba

Simplify.

1. 18a
2. 18a​2​​
3. 45a
4. 45a​2​​

Simplify.

1. ​5​​1​​x
2. ​6​​1​​x
3. ​5​​1​​x​2​​
4. ​6​​1​​x​2​​

Like terms

Like terms are terms with exactly the same letter combination.

Are 3a and 5a like terms?

1. Yes
2. No

Are 3a and 5b like terms?

1. Yes
2. No

Are -3xy and 5xy like terms?

1. Yes
2. No

Are 2xy and 5xz like terms?

1. Yes
2. No

Are 3b and 8 like terms?

1. Yes
2. No

Are 3abcde and 8abcde like terms?

1. Yes
2. No

Are the terms on the right like terms?

1. Yes
2. No

Like terms

Like terms

8a + 7a = 15a

8a + a = 9a

8a + 2b = cannot be simplified

8a + 2b = na

8a + 2a + a = 11a

8a + 5 = na

a + a = 2a

Simplify if possible. If not, write na.

22a + 8a

Simplify if possible. If not, write na.

10x + 17y

Simplify if possible. If not, write na.

5x + 9

Simplify if possible. If not, write na.

3a + a

Simplify if possible. If not, write na.

19b + 6b + b

Simplify if possible. If not, write na.

24ab + 12ac

Simplify if possible. If not, write na.

x + x

Simplify if possible. If not, write na.

a . a

1. 2a
2. 2a​2​​
3. a​2​​
4. na

Like terms

Make on page 25 exercise 51, 52abcdef

Like terms

8a + 7a + 3b = 15a + 3b

8a + 3b + 7a = 15a + 3b

8a + 3b + 7a + 2b = 15a + 5b

Simplify if possible. If not, write na.

6x + 3y + 2x

Simplify if possible. If not, write na.

5a + 7b + 3a + 2b

Simplify if possible. If not, write na.

3ab +2ac + 12ab + 4ac

Like terms

Make on page 25, 26, 27 exercise 

51, 52abcdef, 54, 56, 58