Video Transcript
1,311 plus 8,384 equals what.
Probably the best way to add these
two four-digit numbers would be to use the standard written method. It doesn’t matter which order we
write the numbers. We know we can add numbers in any
order. The result will still be the
same. So let’s start by writing the
largest number first. It’s really important that we write
the digits from both numbers in the correct place value. So let’s model this number using
some counters.
This eight digit in 8,384 is worth
8,000. And we can model that with our
8,000 counters. This three digit is in the hundreds
place. Its value is 300. And we can model this with three
100s counters. This eight digit is worth eight
10s. Its value is 80. And we can model this with eight
10s counters. The four is in the ones place. Its value is four. And we can model this with four
ones counters. And we need to add 1,311.
The first one digit is in thousands
place. We need to make sure to put the
three in the hundreds place and line all the digits up in the correct column. And we always start by adding in
the ones column. We’ve already got four ones, and we
need to add one more. Four and one more is five. We can write the total number of
ones in the ones place.
Next, we add in the tens
column. We’ve already got eight 10s, and we
need to add one more. We’ve got a total of nine 10s. Now we can add in the hundreds
column. We’ve got three 100s, and we need
to add three more. Three plus three is six. We’ve got a total of six 100s. Finally, we can add in the
thousands column. We’ve got eight 1,000s. We need to add one more. We know that eight plus one is
nine, so we’ve got a total of nine 1,000s.
We found the sum of 1,311 and 8,384
using the standard written method. The sum is 9,695.
