1. LONG MULTIPLICATION
is just multiplying two numbers

2. Let’s try it!

3. A problem
892 x 11
892 x 10 = 8,920
892 x 1 =
The product of any number
multiplied by 10 is that
number with a zero added
You don’t have to solve every problem the exact same way. With this problem it is easy to see that 1 x 892 = 892.

4. Add up the answers from the first problems
892 x 11 1 1
892 x 10 = 8,920
892 x 1 = 20
+ 90
110 9 8 1 2
After the first problems, where we multiplied, now we add up the answers = = 110. So, we take down the 10 here and add the 1 to the 100s column over here. Now we add those up = = 18. Bring down the 8. Put the 1 here.
= 1,800

5. Before you go
Before you go … when you do any problem, you should do a reality check

6. Do a reality check
Could this really be true?

7. MATH reality check
900 x
9,900
892 x 11
9,812
< 9,900

8. Check!

9. MATH reality check 892 x 11 2 x 1 ----- 2 9,812
Here is a really easy one – the 2 x 1= 1, so the last digit in your answer should be 2. Is it?
9,812

10. Check!
Check again. You passed.

11. Does this pass a reality check?
892 x 11 37,475
No, it does not. Now go back to study more or take a quiz to go back to the game.