How to calculate 48 multiplied by 21


Long Multiplication

How to calculate 48 multiplied by 21 using long multiplication. Here is step-by-step how to calculate 48 times 21 using long multiplication:

Step 1: Setup
Set up your multiplication problem like this:

              4 8
      x       2 1
                 

Step 2: Multiply
8 x 1 = 8. Put 8 below the line and 0 as a reminder on top:

              0  
              4 8
      x       2 1
                8

Step 3: Multiply
1 x 4 = 4. Take 4 and add 0 from the previous step to get 4. Enter 4 at the bottom:

              4 8
      x       2 1
              4 8

Step 4: Add 0
Enter a 0 at the bottom right as a place holder, because you now move over one digit:

              4 8
      x       2 1
              4 8
      +         0

Step 5: Multiply
2 x 8 = 16. Put 6 below the line and 1 as a reminder on top:

              1  
              4 8
      x       2 1
              4 8
      +       6 0

Step 6: Multiply
2 x 4 = 8. Take 8 and add 1 from the previous step to get 9. Enter 9 at the bottom:

              4 8
      x       2 1
              4 8
      +     9 6 0

Step 7: Add to get answer
Add up the bottom two numbers (48 + 960 = 1008) to get the answer:

              4 8
      x       2 1
              4 8
      +     9 6 0
      =   1 0 0 8

The bottom line is the answer. Therefore, 48 times 21 equals:

1008


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How to calculate 49 multiplied by 21
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