Name: ____________________________________
Date: _____________________________
Extra Practice: Scientific Notation
(to be completed on looseleaf)
1. Write each number in scientific notation.
a) 479 000
b) 377 000 000
c) 723  102
d) 67.3  105
2. Write each number in standard form.
a) 3.09  103
b) 4.67  105
c) 1.999  106
d) 7.042  104
3. Express each value in scientific notation.
a) Mount Everest is approximately 8848 m above sea level.
b) The population of China in 2005 was about 1 313 973 713.
c) In 2004, there were about 14 984 000 cell phones in Canada.
4. Write each number in standard form.
a) In 2005, the total Canadian public debt was approximately $775 billion.
b) More than 400 thousand deaths in the U.S. each year are from smoking-related illnesses.
c) In 2005, there were 20.9 million Internet users in Canada.
5. Mr. Steiner’s herd of 413 sheep consumes 79 kg of grass per day. How much grass is needed to feed the herd for
one year? Express your answer in scientific notation.
6. Write a number that is ten times larger than each number.
a) 2.9  107
b) 1.199  103
c) 7.6  1011
d) 6.7  1021
7. Explain why 32.1  106 and 3.21  107 represent the same number. Which form scientific notation? How can you
tell?
8. Assume that one drop of water has a volume of 1 mL. How many drops of water could fill a bathtub measuring
250 cm long, 110 cm wide, and 60 cm high? Express your answer in scientific notation. (Hint: 1 mL = 1 cm3)
Name: ____________________________________
Date: _____________________________
Extra Practice: Divisibility Rules
(to be completed on looseleaf)
1. Are these numbers divisible by:
• 3?
• 4?
• 6?
• 9?
Explain how you know.
a) 2589
b) 614 892
c) 12 195
2. Fill in the missing digit to make each number divisible by 6. Is there more than one correct answer?
a) 12___6
b) 777___12
c) 8___70
d) 151 43___
e) 1 6___2 232
f) 1 253 24___
3. Fill in the missing digit to make each number divisible by 9.
a) 2___22
b) 1___72
c) 78 9___4
d) 56___1
e) 98 1___0 121 f) 1 3___4 999
4. Determine if the following statements are true or false. Explain your reasoning.
a) All even numbers are divisible by 4.
b) All numbers divisible by 9 are also divisible by 3.
c) All numbers divisible by 16 are also divisible by 2 and 4.
d) All numbers divisible by 3 are also divisible by 9.
5. 112 students are divided into groups of six for a floor hockey tournament. How does the coach know there will be
extra students?
6. Find two numbers in the thousands that are divisible by 2, 3, 4, 6, and 9.
7. Four friends won 2780 jellybeans. Can each person get an equal share? How many jellybeans will each person
get?
8. Trevor is building a 3 m by 8 m stone walkway. Each stone is 50 cm by 70 cm. Can he build it without any
waste?
9. Use the divisibility rules to determine if the following numbers are prime.
a) 7 259 254 187
b) 111 195 112 233
c) 91 000 017 017
d) 7 128 717