Actually comparing the two and finding out the difference between the two
Missing addend- subtraction
Find out the missing number- kind of like comparison
Sharing(partitive) concept- division
Passing around one to each until it runs out
Measurement(subtractive) concept- division
Subtracting the number being divided until it runs out
Algorithm
Specific set of instructions for carrying out a procedure or solving a problem, usually with the requirement that the procedure terminate at some point
Left to right addition
An algorithm that begins with the digits on the left
Closure property for addition
for any whole numbers a + b is a unique whole number
Closure property for multiplication
For any whole numbers, a*b is a unique whole number
Additive Identity
a+0=a
Identity property for multiplication
a * 1 = a
Commutative of Addition
a+b = b+a
Commutative of multiplication
a * b = b * a
Associative of addition
(a + b) + c = a + (b + c)
Associative of multiplication
(a * b) * c = a * (b * c)
Distributive property for multiplication over addition