6.6 Lesson 9 Practice Problems

Select all the expressions that represent the area of the large, outer rectangle.

• 5·2+5·4

• 5·2·4

• 5·2+4

• 5·6

• 5(2+4)

Which expression is equivalent to 50·19?

• 50·(10+9)

• 50·10+50·9

• 50·19

• 50+19

Complete each calculation using the distributive property: 98 × 24.

• (100 - 2) × 24

• (98 + 2) × 24

• 98 × (20 + 4)

• (100 + 2) × 24

Select all the expressions that represent the area of the shaded rectangle on the left side of the figure.

• 12 × (20 + 4.5)

• 20 × 12 × 15.5

• 15.5 × 12

• 15.5 × 12 + 4.5 × 12

Which expression is equivalent to 4a?

• a + a + a + a

• a + a + a

• 2a + a

• 3a + a + a

What is the result of using the distributive property on 21 × 15?

• (20 + 1) × 15

• 21 × (10 + 5)

• (21 + 1) × 15

• 21 × (15 + 1)

Do a + a + a + a and 4a have the same value for any value of a?

• Yes, they are always equal.

• No, they are never equal.

• Yes, but only when a = 1.

• No, only when a = 0.

What equation represents the relationship of 120% of $ x $ being equal to 78?

• $ 1.2x = 78 $

• $ 0.12x = 78 $

• $ x + 78 = 120 $

• $ 120x = 78 $

If 120% of $ x $ is 78, what is the value of $ x $?

• 65

• 78

• 65

• 90

Kiran's aunt is 17 years older than Kiran. How old will Kiran's aunt be when Kiran is 15 years old?

• 32

• 30

• 28

• 33