Numbers and Place Value

Question 1

Multiplying decimals

Answer 1

multiply as per usual then put the decimal in the answer as many places as the original numbers combined..

Question 2

Order of operations

Answer 2

Brackets first
Powers
Multiplication and division
Addition and subtraction

Question 3

Irrational numbers

Answer 3

Can’t be written as a simple fraction

Irrational meaning can’t be written as a ratio (fraction)

Question 4

How do you divide fractions?

Eg. 3/4 divided by 6/10

Answer 4

The first part stays the same, change the divide to a multiply then flip the second number. Work it out then simplify

Question 5

How do you find out the percentage of number?

60% of 225?

7/12 of 450?

Answer 5

Google it

Question 6

What is a cardinal number?

Answer 6

How many of something there are.

Eg. There are 5 coins or 10 bottles

Question 7

What is an ordinal number?

Answer 7

The position of something in a list

Question 8

What is a nominal number?

Answer 8

A number used as a name or to identify something

Question 9

What is a prime number?

Answer 9

A whole number that can’t be made by multiplying other whole numbers

Question 10

What is a composite number?

Answer 10

A number that can be divided exactly by a whole number other than itself

Question 11

What Is an array?

How could you use an array to teach multiplication?

Answer 11

An arrangement of objects, pictures or numbers in columns or rows.

Arrays can be used to teach multiplication as they show a visual representation of the question

Question 12

How much is GST?

Answer 12

10%

Question 13

Basic facts of addition strategies and teaching ideas for each

Answer 13

Count on facts - using marbles in a tin (starting with x amount already in tin) begin counting from x as you add another

Doubles facts - visualising real objects that come in a particular amount that can be doubled for example: bicycle wheels

Doubles + 1 or +2 - facts that are almost doubles can be shown on ten frames 5+ 6 is the same as double 5 + 1

Tens facts - using a 10 frame and counters to draw attention to how many counters are missing

Bridging to ten - useful for numbers close to 10 like 9 or 8. Use a double tens frame and in the top frame place 9 or 8 counters in one colour on the second frame place the second number in the fact

Last facts - 7+4 doesn’t fit into any other facts this should be emphasised