1.
two intersecting lines that have four right angles formed at the intersection points
2.
an answer based on good number sense
3.
a set of numbers or objects in which all the members are related to each other by a specific rule
4.
form of a fraction in which the numerator and denominator have no factor in common except 1
6.
gets smaller in size, number, or quantity
7.
a method used to find an answer
8.
also known as partioning
9.
the sum or whole amount
