Exploring Order in Mathematics. Add Mentally 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 10.

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Presentation transcript:

Exploring Order in Mathematics

Add Mentally = 10

Does Order Matter in Mathematics? 3 7 = = = = 8 Commutative Property of Multiplication Commutative Property of Addition When order doesn’t matter: 7 – 5 = +2 5 – 7 = ÷ 5 = 2 5 ÷ 10 =.5 Changing the order yields a different answer:

The Fair Ms. Delores is taking her children and grandchildren to the fair. Tickets to get in cost $4 each. She paid for 5 grandsons, 2 daughters, and herself. How much did Ms. Delores spend on her grandchildren’s tickets? Write an equation and show or explain how you solved the equation. Using the two equations you already wrote, write a new equation that gives the total amount Ms. Delores paid for tickets to go into the fair. How much did Ms. Delores spend on adult tickets? Write an equation and show or explain how you solved the equation.

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Does Order Matter in Mathematics?