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.

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Presentation transcript:

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. 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: Even whole numbers have a decimal. The 4 has a decimal after it Line up the decimal Fill in zeros

Subtraction Line up the decimal Fill in Zeros Put the larger number on top