Numbers
-4 + -5
-9
Write this correctly in algebra:
7 times a
7a
What is 3/4 as a decimal?
0.75
When you see the following expression, what is the big number called and what is the little number on top of it called?
24
Big number - base number
little number - exponent or power
What does BIDMAS stand for?
Brackets, Indices, Multiplication & Division, Addition & Subtraction
62
Evaluate x2 - 4x if x = -3
21
Round this number to 2 d.p. (decimal places):
13.486245
13.49
In algebra, what is the number before a variable called?
Coefficient
What are like terms?
Like terms are terms that have the same variables and similar variables have the same power.
Write the following in index form:
2 x 4 x 2 x 7 x 4 x 7 x 5
22 x 42 x 5 x 72
Simplify the following:
3x + 1 - x - 10 + y
2x + y - 9
Decimal to fraction: 9.26
9 and 13/50
Solve the following equation: 4x + 3 = -12
Score double if you can show full and correct working out.
x = -15/4
An Australian state formerly known as 'Van Dieman's Land'
Tasmania
Evaluate:
5 x 3 - (42 - (-6) + 22/2)
-18
Mary has y books. Tom has 4 more books than Mary. Cindy has 5 times as many books as Tom. Write down an expression, in terms of y, that can be used to work out the number of books that Cindy has. (Don’t actually calculate the number of books.)
Cindy has 5(y+4) books
1/3 - (-3/4)
13/12 or 1 1/12
Give two examples of a pair of primes that add to a prime number. Explain why all possible pairs of primes that add to a prime must include the number 2
17 and 2
Because 2 is the only even prime number, so the sum of 2 and a prime number is also a prime number.
The year 1104 was in which century?
12th century
Find 2 whole numbers that square root of 51 lie between.
Which numbers out of the two that the result is closer to?
7 and 8
square root of 51 is closer to 7
Solve (-3x + 1)/5 = -7
x=12
Draw a diagram to show eight sixths of one half
Answer to be revealed by your teacher.
The game of ‘clusters’ involves a group getting into smaller-sized groups as quickly as possible once a particular group size has been called out.
If a year level consists of 120 students, which group sizes (of more than one person) would ensure no students are left out of a group?
60 groups of 2
40 groups of 3
30 groups of 4
24 groups of 5
20 groups of 6
15 groups of 8
12 groups of 10
10 groups of 12
Find two square numbers that add to 85
49 and 36