3rd Grade Unit 2 Vocabulary

A number being added or joined together with another number(s)

• Addend

• Difference

• Equation

• Expression

Numbers that are slightly adjusted to create groups of numbers that are easy to compute mentally

• Addend

• Expression

• Compatible Numbers

• Whole Numers

a pattern or sequence of numbers in order without interuption

• Compatible Numbers

• Consecutive

• Whole Numbers

• Fluency

the set of positive numbers that begins at one and increases by increments of one each time (1,2,3...)

• Whole Numbers

• Compatible Numbers

• Consecutive

• Counting (natural) Numbers

the remaining amount after the subtrahend has been subtracted from the minuend. The answer to a subtraction problem.

• Sum

• Difference

• Estimation

• Equation

A mathematical statement composed of equivalent expressions separated by an equal sign

• Equation

• Expression

• Minuend

• Subtrahend

Rounding to determine an approximate value

• Estimation

• Expression

• Equation

• Consecutive

A mathematical phrase, with no equal sign or comparison symbol, that may contain a number(s), and unknown(s), and/or operator(s)

• Equation

• Expression

• Estimation

• Minuend

Efficient application of procedures with accuracy

• Minuend

• Addend

• Rounding

• Fluency

A number from which another number will be subtracted

• Subtrahend

• Minuend

• Polygon

• Addend