autumn myst

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Autumn Myst. Your Subtitle Goes Here. Add, Subtract and Compare. Suppose you go to a store and purchase a $23 item and a $7 item. What would you say if the clerk added the items this way? Would you pay $93? Of course not!. Place Value. The numbers were not lined up correctly. - PowerPoint PPT Presentation

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  • Autumn MystYour Subtitle Goes Here

  • Add, Subtract and CompareSuppose you go to a store and purchase a $23 item and a $7 item. What would you say if the clerk added the items this way? Would you pay $93? Of course not!

  • Place ValueThe numbers were not lined up correctly. The 7 should be in the one's place. When adding, ones should be added to ones, tens to tens, and hundreds to hundreds. The same is true for tenths, hundredths, and thousandths.

  • To insure that like place values are added, line up the decimal first

  • Follow the example: 2.3 + 4 + 5.023 Even whole numbers have a decimal. The 4 has a decimal after it. 2.3 + 4. + 5.023

    Line up the decimalFill in zeros

  • Subtraction Line up the decimalFill in ZerosPut the larger number on top