This Illana's Secret (-Near Doubles/Halves) lesson plan also includes:
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When it comes to missing addends, learners can benefit from examining several equations to notice patterns and connections. They observe 10-sided dice rolls in which they are given the first roll and the sum of both rolls. Mathematicians figure out the other roll through either addition or subtraction strategies, completing 18 number sentences. Working with partners, they write out how they found the numbers and then any patterns or connections they notice. Worksheets and extension ideas are included.