Numbers in Base Ten

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Place Value

Look at the picture of the place value chart above.


Click HERE and HERE to play games to practice memorizing the place value chart. On the pirates game, be sure to pick the decimals version.


Remember, the value of digits increase as you move to the left and the value of digits decrease as you move to the right.


Click HERE to play a game practicing the value of digits.

Number Forms

Click HERE to watch the video explaining Number Forms.

Standard Form: This is just the numbers

Ex.: 5,432.8


Expanded Form: This expands the number out to see more about the value of each digit.

Ex.: 5,432.8 = 5000 + 400 + 30 + 2 + 0.8


Word Form: This is how you would write it or say it. You read the number in periods, naming the periods each time.


Ex.: 912,733.82 = Nine hundred twelve thousand, seven-hundred thirty-three and

eighty-two hundredths

Rounding Numbers to a Named Place Value

Click HERE to watch the video explaining rounding.


Click HERE and HERE to play fun games to help you practice rounding decimals.

Understanding Powers of Ten

Click HERE to watch a video to help you understand Powers of 10.

Adding and Subtracting Numbers with Decimals

Click HERE to watch a video explaining how to add and subtract numbers with decimals.


Want to play some games to help you practice adding and subtracting decimals?


Click HERE or HERE for two different games.

Multiplying Multi-Digit Numbers

Click HERE to watch a video explain how to use place value to help you multiply multi-digit numbers. ****** This is main way we learn it in class and is the most efficient way to solve multi-digit multiplication problems with the least amount of mistakes.


Click HERE to watch a video explaining the standard algorithm for multiplying mult-digit numbers.


Click HERE to watch a video explaining the area model from multiplying multi-digit numbers.

Multiplying Numbers with Decimals

Click HERE to watch a video explaining how to multiply numbers when they have decimals in them.

Dividing Multi-Digit Numbers


Click HERE to watch a video explaining the Big 7 model from dividing multi-digit numbers.