CALCULATING • EXPANDED SHORT MULTIPLICATION 115
As you multiply numbers
with more digits, you'll
need to add extra rows
to your answer.
Finally, we just need to add together our
three answers to get the final answer:
24 + 160 + 3200 = 3384
So, 423 × 8 = 3384
Next, we multiply the 2 tens by 8 ones.
The answer is 16 tens. This is the same as
160, so we write 160 on the row beneath 24.
Now we multiply the 4 hundreds by
8 ones. The answer is 32 hundreds.
This is the same as 3200, so we write
3200 on the line below 160.
423
8
Multiply the
tens digit by 8
H T O
×
Th
24
160
423
8
Multiply the
hundreds digit by 8
H T O
×
Th
24
160
3200
423
8
H T O
×
Th
24
160
3200
3384
Stretch yourself
If a single spider has 8 legs, how
many legs do 384 spiders have?
TRY IT OUT
Answer on page 319
All we need to do is multiply
each digit of 384 by 8 then
add the answers together.
We can use expanded short
multiplication to work out
the answer. We simply need to
multiply 8 by 384.
Add the three
lines in the
answer together
423 × 8 = 3384
114_115_Expanded_short_multiplication.indd 115 29/02/2016 14:11