Bluebonnet Vocab Module 1

Addends

the numbers you add together.

Algorithm

a step-by-step way to solve problems.

Bundling, making, renaming, changing, regrouping

trading 10 small pieces for 1 bigger piece (like 10 dimes for 1 dollar).

Compatible numbers

numbers that are easy to add or subtract when you estimate answers.

Compose

putting smaller parts together to make a bigger part.

Decompose

breaking a bigger part into smaller parts.

Difference

the answer you get when you subtract.

Digit

a single number from 0 to 9.

Endpoints

the starting and ending numbers in a range; these can help when using a number line.

Equal to

means the same as (like =).

Equation

a math sentence that shows two things are equal.

Estimate

a good guess about a number.

Expanded notation

writing a number as separate parts showing what each digit means.

Expression

a collection of numbers connected by plus or minus signs that shows a value.

Greater than

a sign (>) that shows one number is bigger than another.

Halfway

the middle point between two numbers (like 1,500 is in between 1,000 and 2,000).

Less than

a sign (<) that shows one number is smaller than another.

Number line

a straight line with numbers placed at equal spaces.

Number sentence

a math problem that shows a calculation with only numbers.

Place value

the value a digit has based on where it is in a number.

Rounding

making a number easier by changing it to a nearby value.

Standard form

writing numbers using just digits.

Strip diagram

a picture that helps to show a word problem (like a bar chart).

Sum

the answer you get when you add numbers.

Unbundling, breaking, renaming, regrouping

trading a big piece for 10 small pieces (like swapping 1 dollar for 10 dimes).

Unit form

writing a number that shows how many of each place value it has.

Word form

writing a number using words instead of digits.