Place Value

Question 1

Place value

Answer 1

The value a digit holds based on its position in a number (powers of 10).

Question 2

Expanded form

Answer 2

A number written as the sum of the values of each digit (e.g., 3502 = 3000 + 500 + 2).

Question 3

Standard form

Answer 3

The normal way we write numbers using one string of digits (e.g., 56 983).

Question 4

Composition (of numbers)

Answer 4

Re-combining expanded parts to form the standard number.

Question 5

Decomposition (of numbers)

Answer 5

Breaking a number into the place-value value of each digit.

Question 6

Placeholder zero

Answer 6

A zero that shows no units in a place but keeps other places aligned.

Question 7

Algorithm

Answer 7

A step-by-step procedure for solving a type of math problem.

Question 8

Break-apart addition

Answer 8

Adding by splitting a number into easier parts (tens, ones) then combining.

Question 9

Open number line

Answer 9

A blank line used to show jumps that represent mental addition or subtraction.

Question 10

Base-10 system

Answer 10

Number system where each place is worth 10 × the place to its right.