Large Numbers
What is the value of the digit 7 in 47,325?
7,000
What is the square root of 25?
5
What is one common factor of 8 and 12?
1, 2 or 4
What do we call a living thing in an ecosystem?
Biotic organisms
Write 2 × 2 × 2 using exponential notation.
23
Write 305,082 in expanded form.
300,000 + 5,000 + 80 + 2
What number multiplied by itself equals 144?
12
List all the common factors of 12 and 18.
1, 2, 3 and 6
What is the main source of energy for most ecosystems?
The Sun
What is the base in 53?
5
What number is 10,000 more than 789,456?
799,456
What is the square root of 225?
15
What is the greatest common factor (GCF) of 24 and 36?
12
What is the role of decomposers in an ecosystem?
They break down dead organisms and waste, returning nutrients to the ecosystem.
Evaluate 33.
27
Arrange these numbers from smallest to largest: 456,789; 465,798; 456,879; 465,789.
456,789; 456,879; 465,789; 465,798
Between which two whole numbers does √50 lie?
7 and 8
Find the GCF of 48 and 60.
12
What might happen to the rabbit population if the number of foxes in an ecosystem decreases? Explain why.
The rabbit population may increase because fewer rabbits are eaten by foxes.
Write 43 in expanded form and calculate its value.
4×4×4=64
A city has a population of 2,485,675. Another city has 3,756,890 people. What is their combined population?
6,242,565
The area of a square garden is 324 m². What is the length of one side?
18 m
A teacher has 72 pencils and 96 erasers. She wants to make identical prize packages with no items left over. What is the greatest number of packages she can make?
24 packages
In a food chain, grass → grasshopper → frog → snake, what could happen to the frog and snake populations if the grasshopper population suddenly decreases? Explain your reasoning.
Frog populations may decrease because they have less food. Snake populations may also decrease because there are fewer frogs to eat.
A bacteria population doubles every hour. If there is 1 bacterium at the beginning, how many bacteria will there be after 6 hours? Write your answer using exponential notation and calculate it.
26=64 bacteria