Front

Compatible numbers

Back

A method for estimating a group of numbers by slightly adjusting some or all of the numbers to allow for easy mental computation.

Front

Counting (natural) numbers

Back

The set of positive numbers that begins at one and increases by increments of one each time {1, 2, 3, ..., n}.

Front

Dividend

Back

The number that is being divided.

Front

Divisor

Back

The number the dividend is being divided by.

Front

Estimation

Back

Approximate value.

Front

Factor

Back

A number multiplied by another number to find a product.

Front

Fluency

Back

Efficient application of procedures with accuracy.

Front

Product

Back

The total when two or more factors are multiplied.

Front

Quotient

Back

The size or measure of each group or the number of groups when the dividend is divided by the divisor.

Front

Rounding

Back

A method for estimating a number by increasing or retaining a specific place value digit according to specific rules and changing all trailing digits to zero.