Warm Up. Ten Minute Math. Today's Number: 219 Create an expression equal to 219. You must use only S UBTRACTION in each expression. Example: 239-20=219 and 250-30-1=219 Describe and write about your strategies. Select a familiar array from the list created the day before.
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Today's Number: 219
Example: 239-20=219 and 250-30-1=219
Select a familiar array from the list created the day before.
Example: Egg Carton
What are the dimensions of an Egg Carton?
What other ways can you think of to arrange 12 eggs into an array, besides 6 by 2 or 2 by 6?
Is there another way to write 6x2?
6 x 2 array of 12 eggs
Arrays of Twelve
15 and 4523 and 4616 and 64
24 and 4817 and 3425 and 50
18 and 5427 and 8119 and 38
29 and 5821 and 4236 and 72
22 and 66
*Label each array with its dimensions (for example, 6 x4 and 4 x6)
Example: Between 12 and 24 or 18 and 36?