nearest 10

break apart

friendly numbers: numbers that can be subtracted easily.

regroup: addend place value: subtract

Key of a picture graph: Each * = 4 votes. Each * represents 4 votes.

skip counting

One jump of six show one group of six.

Equal parts is the same shape, equal share are the same amount.

Elapsed time: the amount of time that passes from the start to the end of an activity.

If something’s metric, it’s related to a system that uses the meter as a basic measurement.

intersecting line segments, perpendicular line segments, parallel line segments.

A conjecture is a good guess or an idea about a pattern.