ffirs.indd

Direct Multiplication 189
How would you use this method to solve 34 × 76?
One method would be to use 30 as a reference number and use
factors of 2 × 38 to replace 76. You could also solve it directly using
direct multiplication. Here is how we do it:
76
× 34
We will multiply from right to left (as is most common), and then
try it again from left to right.
First, we begin with the units digits:
6 × 4 = 24
We write the 4 and carry the 2. Th en we multiply crossways and add
the answer.
7 × 4 = 28
3 × 6 = 18
28 + 18 = 46
(To add 18 you could add 20 and subtract 2.)
Add the carried 2 to get 48. Write 8 and carry 4.
Now multiply the tens digits:
3 × 7 = 21
Add the 4 carried to get 25. Now we write 25 to fi nish the answer.
Th e calculation was really done using traditional methods but
written in one line. Th e fi nished calculation looks like this:
76
× 34
254824
Here are the steps for this problem:
6 × 4 = 24