4th Grade Resources

Multiplying multi-digit numbers and checking with division:

Multiplication and division are partners! When you multiply, it is like wrapping a present. We can check our work to make sure we multiplied correctly by unwrapping the present, or dividing.

HERE is a video of Mrs. Ytreeide walking through a multi-digit multiplication problem and checking her solution using division.

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Game: Make the Largest Product

Here is a game that we've played in math group! If you don't have a deck of cards, you can dice or try these virtual tools for coming up with a number: Dice Roller, Adjustable Spinner. Try using your birthday! If your birthday is on November 24th, use 1 1 2 4 as your numbers for this game. You can also just choose or ask someone at home to choose four different numbers for you to use!

1. Shuffle cards and place them face down in a stack. (Or choose your four numbers in another way.)

2. Take four cards from the top of the stack and use them to create a 3-digit by 1-digit multiplication problem (three numbers on top and one number on the bottom). You'll be multiplying a number into the hundreds by a single digit number.

3. Write and solve your multiplication problem.

4. Rearrange your numbers and try to find the largest product, or the biggest number you can make.

5. Keep a record of the problems you make and their answers.

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Solving a multi-digit multiplication problem using the Area Model:

Here is a video of Mrs. Ytreeide solving a multi-digit multiplication problem using an area model.

When you're done, your work should look something like this: