1718 WB1Y CH12 Lesson 3

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Which exercises/theory should I discuss on the board?

Multiplying variables

Multiplying variables

Terms and Factors

In the formula y = 5a + 3 + 2a
5a, 3 and 2a are called terms
5a + 3a = 8a, so 8a is the sum of 5a and 3a
3 and 8a are not like terms, so they cannot be taken together.

In the formula y = 5a x 3 x 2a
5a, 3 and 2a are called factors
5a x 3 x 2a =              , so                is the product of 5a, 3 and 2a.

30a​2​​

30a​2​​

y = 3a x 7a
What is 3a in this formula?

1. a term
2. a sum
3. a factor
4. a product

y = 5a + 7a
What is 5a in this formula?

1. a term
2. a sum
3. a factor
4. a product

What is the product of 5 and 3a?

1. not possible
2. 8a
3. 15a
4. something else

What is the sum of 5 and 3a?

1. not possible
2. 8a
3. 15a
4. something else

Writing formula shorter

You can write formulas shorter by multiplying the factors.

HW Monday

Make and correct:
8, 9, 10, 11, 12, 13, 14, 15