Topic 3 Vocab and Fluency

Front

A tool that can start at any number.

Back

open number line

Front

Digit indicating count of ones in a number?

Back

ones

Front

Math done in your head?

Back

mental math

Front

Mental math strategy of adjusting addends: ___________?

Back

compensation

Front

Breaking a 2-digit number into the value of its digits is called _____________?

Back

break apart

Front

Digit showing groups of ten in a number?

Back

tens

Front

Break apart 38

Back

30 + 8

Front

Number without 2 in tens place:

Back

2