When we are multiplying by numbers greater than 12, there are 3 steps to the process.


First Step We multiply by the units first. 4 × 7 units = 28 units


28 is made up of 2 tens and 8 units, so we put the 8 as our answer in the units column and put the 2 tens to the tens column. 4 × 5 tens = 20 tens and when we add in the extra 2 tens we get 22 tens.


22 tens is made up of 2 hundreds and 2 tens, so we put 2 as our answer in the tens column and put the 2 hundreds to the hundreds column.


Finally, 4 × 2 hundreds = 8 hundreds. When we add in the extra 2 hundreds, we get 10 hundreds.


10 hundreds is made up of 1 thousand and 0 hundreds, so we put 0 as our answer in the hundreds column and 1 as our answer in the thousands column.


×


Th H T U 2 5 7 2 3 4


1 0 2 8 2


Second Step Now we multiply by the 3 tens. Because we are multiplying by tens, we will always have a 0 in the units column.


3 tens × 7 units = 21 tens, which is made up of 2 hundreds and 1 ten.


So we put the 1 ten in the tens column and carry the 2 hundreds to the hundreds column.


3 tens × 5 tens = 15 hundreds. When we add in the extra 2 hundreds we get a total of 17 hundreds, which is made up of 1 thousand and 7 hundreds. So we put the 7 hundreds in the hundreds column and put the 1 thousand to the thousands column.


Finally, 3 tens × 2 hundreds = 6 thousands. When we add in the extra 1 thousand we get a total of 7 thousands, which we record in the thousands column.


×


Th H T U 2 5 7 2 32 4


1 0 2 8 7 7 1 0


1 2


Operations 2


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