NCEA Level 1 Maths 1.7
When adding or subtracting integers and the signs are different, it is changed to...
A minus sign.
When multiplying or dividing integers and the signs are different, the answer is...
A negative number.
When adding or subtracting integers and the signs are the same, it is changed to...
A plus sign.
When multiplying or dividing integers and the signs are the same, the answer is...
A positive number.
How do you add or subtract fractions when the bottom numbers are the same?
By adding or subtracting the top numbers and putting the result over the bottom number, then simplifying.
How do you divide fractions?
By changing the ÷ sign to × and flipping over the second fraction, then multiplying the result and simplifying.
How do you write a fraction as a percentage?
By changing to a decimal and then multiplying by 100.
How do you add or subtract fractions when the bottom numbers are different?
By cross multiplying the top numbers and multiplying the bottom numbers, then simplifying.
How do you write a percentage as a decimal?
By dividing by 100.
How do you write a fraction as a decimal?
By dividing the top number by the bottom number.
How do you multiply or divide integers?
By looking at the signs at the front of each number.
How do you add or subtract integers?
By looking at the signs between numbers.
How do you multiply fractions?
By multiplying the top by the top and the bottom by the bottom, then simplifying.
How do you write a percentage as a fraction?
By putting percentage over 100 and simplifying.
What is ratio?
The comparison of two or more quantities measured in the same units.
What are integers?
Whole numbers and their opposites.
