Numbers

Numbers

Mathematics

How we read numbers

We read numbers from left to right.

We read 345,721 as Three hundred and forty five thousand, seven hundred and twenty one

We read 963,013 as nine hundred and sixty three thousand and thirteen

Spelling numbers

People might spell these words wrong.

Ex: 40 forty 14 fourteen 12 twelve 13 thirteen 15 fifteen 50 fifty and etc.

Factors

Factors come in pairs they multiply to get a number. These are the factors of 12 1,2,3,4,6,12. You will see that

-1 times 12 is 12

-2 times 6 is 12

-3 times 4 is 12.

Multiples

A multiple is just timetables which has an infinite amount. Multiples of five are 5,10,15,20,25,30,35,40,45,50,55,60 and it goes on.

_{Prime numbers}

Prime numbers has only 2 factors which are 1 and itself. 2 is a prime number it has 1 and 2 as a factor, 29 is also a prime number it has 1 and 29 as a factor. 1 is not a prime number because it has only 1 factor which is 1.

Multiple Choice

Which of these is not a factor of 24.

• 1

• 5

• 6

• 4

• 24

Multiple Choice

What is the seventh multiple of 9.

• 9

• 45

• 54

• 63

Multiple Select

Select all the prime numbers

• 11

• 17

• 27

• 47

• 22

Odd numbers

• Ends with 1,3,5,7 or 9

• Can’t be divided by 2.

• 2 Odd numbers add together make an even number.Ex 1+1=2

Even numbers

• Ends with 2,4,6,8 or 0

• Can be divided by 2.

• 2 Even numbers add together get an even number. Ex 2+2=4

• If an odd number add with an even number it will become an odd number. Ex 1+2=3

Thanks for learning

Have a great day!