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
Text of Autumn Myst
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
