FORMULAE AND IMPORTANT CONCEPTS FORM 1
CHAPTER 1: WHOLE NUMBER
· Whole number are 0,1,2,3,4,5,6. It do no contain decimals and fractions.
· Each digit in a whole number has a place value
| Place Value | Hundred Thousend | Ten Thousend | Thousend | Hundred | Tens | Ones |
| Number Eg; 345678 | 3 | 4 | 5 | 6 | 7 | 8 |
· In combined operation
1. Firstly, solve operation in bracket.
2. Then solve multiplication and division operation from left to right.
3. Lastly solve addition and substraction operation from left to right.
CHAPTER 2: NUMBER PATTERNS AND SEQUENCE
· The pattern is the definite order of terms in a sequence.
· Sequence is a list of numbers or objects that follow a certain pattern.
· Odd numbers are whole numbers that are not divisible by 2. Eg: 1,3,5,7,….
· Even numbers are whole numbers which are divisible by 2. Eg: 2,4,6,8,…..
· Prime numbers are whole number that is divisible only by itself and the number 1. (no. 1 not included). Eg: 2,3,5,7…..
· A factor is a number which divides exactly into another number. Eg: Factors of 6 are 1,2,3,6.
· Prime factors of a given whole number are their factors which are prime numbers. Eg: Prime factors of 6 are 2 and 3.
· The product of a given whole number and a non-zero whole number is called the multiple of the whole number. Eg: Multiples of 4 are 4,8,12,….
· A number which is multiple of two or more numbers is called the common multiple of those numbers. Eg: Common multiples of 4 and 6 are 12,24,36,…
· The smallest common multiple of two or more numbers is their lowest common multiple (LCM). Eg: LCM of 2 and 3 is 6.
· A number which is a factor of two or more numbers is called the highest common factor (HCF)of those numbers. Eg: HCF of 12 and 18 is 6.
· The greatest common factor of two or more numbers is their highest common factor (HCF)
