Roman Numerals/1
Pattern/1
subtracting/1
Place value and rounding/1
Multiplication Tables/1
Mixed Multiplication and Division/1
Lcm and Hcf/1
Division Word Problems/1
Division/Division-2
Division/Division-1
, whereas a letter placed before another of greater value subtracts (thus XC is 90).)
 from another to calculate the difference)
 to itself a specified number of times. Thus multiplying 6 by 3 means adding 6 to itself three times.)
 of two numbers is equal to 1, then they are called co-prime or relatively prime. The product of the highest common factor (HCF) and the lowest common multiple (LCM) of two numbers is equal to the product of the numbers.)
