# Whole Numbers Reasoning Strategies

This section describes the specific reasoning strategies and understandings that relate to whole numbers. Reasoning strategies are organized into two categories—those appropriate and those not appropriate to the numbers at hand in the problem.

Click the symbol next to any strategy or understanding to learn more and view video examples.

Strategies appropriate for the numbers at hand Strategies not appropriate for the numbers at hand Breaks numbers apart to add or subtract Uses benchmark numbers to add or subtract Uses addition to solve subtraction problems Counts by ones Uses standard algorithm to add or subtract

### Multiplying and Dividing Mentally

Strategies appropriate for the numbers at hand Strategies not appropriate for the numbers at hand Uses known facts and place value to multiply or divide Breaks numbers apart to multiply or divide Uses benchmark numbers to make estimates Uses standard algorithm to multiply or divide ### Applying Understanding

Understandings Models with mathematics to solve problems in context Uses inverse relationship of addition and subtraction Uses distributive property