Types of Numbers
8, 20 and 156 are examples of this type of number.
Even number
Finding the difference of two numbers means you do what?
Subtract
What is the value of the 3 in:
103.29
3 or 3 ones
What three types of numbers are rational, but don't belong to the set of integers?
Fractions, Decimals, Percentages
What type of number has only two factors?
Prime number
Calculate:
-7 + 12
= 5
The spaces that come behind the point in a number are called ________?
Decimal places
The top number of a fraction is called the ________.
The bottom number is called the _________.
Numerator
Denominator
What are the factors of 15?
1, 3, 5, 15
If we 'square' a number, what are we doing to it?
Multiplying it by itself.
Example:
22 = 2 x 2 = 4
62 = 6 x 6 = 36
Name the number places from thousands to thousandths.
Thousands, Hundreds, Tens, Ones, Tenths, Hundredths, Thousandths
When adding or subtracting decimals, what do you make sure to do?
Line up the decimal point and number places
Give the correct order of the numbers below from lowest to highest value:
14, -1, 9, 0, -5
-5, -1, 0, 9, 14
From larger negative digit to zero to larger positive digit.
Calculate:
15 - (2 x 3)
= 9
--------
15 - (2 x 3)
= 15 - 6
= 9
What number do you get if:
6 is in the tens place
1 is in the hundreds place
2 is in the hundredths place
All other places are zero
160.02
What is the meaning of a 'tenth' of something?
When you have one part out of 10 equal parts of a whole or group.
What is the Highest Common Factor of 10 and 20?
= 10
Factors of 10: 1, 2, 5, 10
Factors of 20: 1, 2, 4, 5, 10, 20
Calculate:
-7 x 2 + 3
= -11
----------
-7 x 2 + 3
= -14 + 3
= -11
Which is the fourth number place to the left side of the decimal point?
Ten thousands OR Tens of thousands
Which is more?
1/9 OR 0.1
1/9
This means you have one part out of nine, which is more than one part out of ten.