Create your own centimeter ruler. Then, estimate and measure with lengths with it. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Think through ...
2019 Rule: Decision 34-3/10, a new decision introduced in April 2017, will be incorporated into the Rules as Rule 1.3b(2) so that when the player estimates or measures a spot, point, line, area or ...
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