Multiplication 2: Step By Step Like an N2 Mather

Oh, boy. Now it gets harder. Are you up for the challenge? Let's go!

Today we're gonna work on multiplication again, but this time, it's a little different. Remember when we did multiplication in the last lesson? Remember how in the last one we did 3x3? That was multiplying by just one digit. Now we're gonna multiply by TWO digits. This time, I'll write out the problem and give you a step-by-step guide on how to do it. Hopefully it will help you learn this type of multiplication. Ready? Here we go.

        45
x      32

First, we start out with the number 2, and multiply it by 4 & 5.

        45
x      32
          0
Oh, oh. 2x5 is 10!! But we can only fit only ONE digit in that section!! This is a time where we have to  carry.

        1
        45
x      32
          0
Now, back to where we were before. Don't forget, we need to add the carried number to the sum of this part.


        1
        45
x      32
        90
Now that we're done with this part, we need to go to that second digit. But before we do that, we need to erase (or delete, it depends on what you're using) that one that we had carried.



        45
x      32
        90
But now we need to add another row, and before we start adding with that one other digit, we need to put a zero there. This is because this digit is a ten.



        45
x      32
        90
          0
All right, now we can start multiplying.



        45
x      32
        90
        50
Wait, 3x5 is 15?! Don't forget about carrying!!

        1

        45
x      32
        90
        50

OK, back to the problem at hand. Don't forget about that carried number!!

        1

        45
x      32
        90
    1350
Now what do we do? Well, we're going to add the 2 numbers at the bottom. We won't have to erase that 1 at the top because it won't be in our way. You ready? Let's go!!


        1

        45
x      32
        90
+  1350
        40
Don't forget about carrying!! We'll also need to add that carried number to the sum of this column.


        1

        45
x      32
      1
        90
+  1350
      440
Last part!! Here we go!!



        1

        45
x      32
      1
        90
+  1350
    1440
So 1,440 is our total. We beat the challenge and pushed through multiplication!! AWESOME JOB!!!!
Next time we'll be facing an even greater challenge...
Join me as we get even deeper N2 Math!!