# 3rd Grade Module 2 terminology

• Terminology

New or Recently Introduced Terms and Symbols

§ About (with reference to rounding and estimation, an answer that is not precise)

§ Addend (the numbers that are added together in an addition equation, e.g., in 4 + 5, the numbers 4 and 5 are the addends)

§ Analog clock (a clock that is not digital)

§ Capacity (the amount of liquid that a particular container can hold)

§ Compose (change 10 smaller units for 1 of the next larger unit on the place value chart)

§ Continuous (with reference to time as a continuous measurement)

§ Endpoint (used with rounding on the number line; the numbers that mark the beginning and end of a given interval)

§ Gram (g, unit of measure for weight)

§ Halfway (with reference to a number line, the midpoint between two numbers, e.g., 5 is halfway between 0 and 10)

§ Interval (time passed or a segment on the number line)

§ Kilogram (kg, unit of measure for mass)

§ Liquid volume (the space a liquid takes up)

§ Liter (L, unit of measure for liquid volume)

§ Milliliter (mL, unit of measure for liquid volume)

§ Plot (locate and label a point on a number line)

§ Point (a specific location on the number line)

§ Rename (regroup units, e.g., when solving with the standard algorithm)

§ Round (estimate a number to the nearest 10 or 100 using place value)

§ Second (a unit of time)

§ Standard algorithm (for addition and subtraction)

§ ˜ (Symbol used to show than an answer is approximate)

Familiar Terms and Symbols

§ Centimeter (cm, unit of measurement)

§ Divide (e.g., 4 ÷ 2 = 2)

§ Estimate (approximation of the value of a quantity or number)

§ Horizontal (with reference to how an equation is written, e.g., 3 + 4 =7 is written horizontally)

§ Measure (a quantity representing a weight or liquid volume, or the act of finding the size or amount of something)

§ Mental math (calculations performed in one’s head, without paper and pencil)

§ Meter (m, unit of measurement)

§ Minute (a unit of time)

§ Multiply (e.g., 2 × 2 = 4)

§ Number line (may be vertical or horizontal, vertical number line shown below)

§ Simplifying strategy (transitional strategies that move students toward mental math, e.g., “make ten” to add 7 and 6,  (7 + 3) + 3 = 13)

§ Unbundle (regroup units, e.g., in the standard algorithm)

§ Vertical (with reference to how an equation is written; equations solved using the standard algorithm are typically written vertically)