Video Transcript
Find the product 43 multiplied by
two by multiplying the tens followed by the ones and then adding. 43 multiplied by two equals
what?
In this question, we need to find
the product, which is what we get when we multiply two numbers together, of 43 and
two. And perhaps you know your two times
table up to 10 times two, maybe even 12 times two. But what about 43 times two? This is quite a large two-digit
number that we’re dealing with here. How can we multiply this two-digit
number by two? Well, the question tells us. First, we’re to multiply the tens,
then by the ones, and then add. What does this mean? Well, underneath the calculation,
we can see a picture that can help us here. It’s the number 43 modeled out of
place-value blocks. And place-value blocks are really
useful because they help us see numbers in their different parts. 43 can be partitioned or split up
into four tens or 40 and three ones, which of course have a value of three.
Now what this question is telling
us to do is not to look at 43 all in one go, but to first think about the tens and
multiply 40 by two, then think about the ones and multiply three by two. Now, we know that four times two is
eight, and so four tens multiplied by two is worth eight tens or 80. So if we multiply the tens part of
our number by two, we get the answer 80. Now let’s multiply the ones; three
times two equals six. So we’ve got the answers 80 and
six. And to find the overall answer, we
just need to combine these two parts back together again. 80 plus six equals 86. We found the product of 43 and two
by multiplying the tens, then the ones, and then adding the two answers
together. 43 multiplied by two equals 86.
