Year 9 retrieval quiz

Year 9 retrieval quiz

Recap of online learning topics

Multiple Choice

Classify the following:

-78

• integer

• integer, real

• integer, whole, rational

• integer, rational, real

Multiple Choice

How would 5/9 be classified?

• rational and real
• whole and integer
• only real
• only irrational

Multiple Choice

Classify the following:

0.04769165821735......

• Irrational

• Rational

Multiple Choice

A repeating decimal or decimal that terminates is called a

• Natural Number

• Irrational Number

• Rational Number

• Whole Number

Multiple Choice

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction
• Rewrite the fractions in the simplest form. 
• Find a common denominator. 
• Make each fraction into an improper faction. 

Multiple Choice

Add:  $\frac{1}{2}+\ \frac{1}{3}$  

• 2/5

• 2/6

• 5/6

• 1

Multiple Choice

Subtract:  $\frac{8}{5}\ -\ \frac{2}{3}$  

• 14/15

• 6/2

• 3

• 10/3

Multiple Choice

While making desserts for a bake sale, Lyla used 7/10 of a scoop of brown sugar as well as 1/2 of a scoop of white sugar. How much more brown sugar did Lyla use?

• 1 1/2
• 2/3
• 1/5 
• 3/4

Multiple Choice

A contractor was paving a driveway. He mixed 4/7 ton of sand and 1/3 ton of concrete. How much did the mixture weigh?

• 1/4 ton
• 2/5 ton
• 5/7 ton
• 19/21 ton

Multiple Choice

12% of $90

• $12

• $78

• $10.80

• $102

Multiple Select

What multiplier represents a 10% increase

• 110%

• 10%

• 1.10

• 1.1

Multiple Choice

What multiplier represents a 30% decrease?

• 30%

• 70%

• 170%

• 0.3

Multiple Choice

Decrease 500 by 30%

• 470

• 350

• 499.70

• 150

Multiple Choice

Increase $90 by 12%

• $10.80

• $102

• $100.80

• $90.12

Multiple Choice

A TV is regularly priced at $900, but it is on sale for 20% off. What's the sale price?

• $320

• $500

• $480

• $720

Multiple Choice

Mark earned $300 in August. In September he earned 8% more than he did in August. How much did he earn in September?

• $164

• $256

• $404

• $324

Multiple Choice

True or False:

13.7 × 10³ is written in standard form.

• True

• False

Multiple Choice

True or False:

When writing

a number in standard form,

the first number must be

greater than 1 but less than 10.

• FALSE

• TRUE

Multiple Choice

What is 45,000 written in standard form?

• 45 × 10³

• 4.5 × 10⁴

• 4.5 × 10³

Multiple Choice

What is 0.00051

written in standard form?

• 5.1 × 10^-4

• 51 × 10^-4

• 5.1 × 10^-5

Multiple Choice

What is 3 × 10^-2 written

as an ordinary number?

• 300

• 3000

• 0.03

• 0.3

Multiple Choice

What is 6.7 × 10⁴ written

as an ordinary number?

• 67000

• 6700

• 670000

• 0.00067

Multiple Choice

What is 162 × 10³

written in standard form?

• 1.62 × 10⁶

• 1.62 × 10⁵

• 162,000