Number Pack 3 Flashcards
HCF, LCM, Product of Primes, Rounding, Metric Units
HCF means what
Highest Common Factor. The biggest number that is a factor of all of the numbers in the question
What is the HCF of 4 and 10
2
LCM means what
Lowest Common Multiple. The first number that is in all the times tables of the numbers in the question
What is the LCM of 4 and 10
20
Product means what
Multiply
A prime factor is what
A factor of a number that is also a prime number
When you find the product of prime factors, what does your answer look like?
Something like 2x3x5 . The numbers in the answer are all prime numbers and they multiply to make the number in the question.
What is the rule about 5 you need to remember when rounding
If the value is 5 or higher in the place value you are rounding, you add 1 onto that number. If it is less than 5, you do not.
Round 14645 to the nearest 100
14600
Round 14645 to the nearest 1000
15000
What is a decimal place
A digit after the decimal point
Round 1.4645 to 2 decimal places
1.46
What is a significant figure
A digit. The higher the value of the digit, the more significant it is
What is the second significant figure of 14645
4000
Round 14645 to 1 significant figure
10000
