Chapter 4
Paragraphs
Solve the following multiplication problems. Be careful not to confuse the letter o with the number 0 or the letters l and i with the number 1.
PROBLEM 19
g
g
a = ?lllld = ?llllg = ?llllo = ?
An explanation of how to solve a multiplication problem follows.
g
Explanation
; g
An important rule to remember is that one times any number equals that number:
g
1 x 4 = 4.llll1 x 1,000 = 1,000.
And
1 x dog = dog.
g
In this problem we see that d x dog = dog.
g
g
Therefore d = 1.
Now look just at the addition part of the problem, replacing all d’s with the number 1.
g
g
Two things become clear: o = 0 and g = 2.
Now return to the whole problem and replace all the d’s with 1, g’s with 2, and o’s with 0.
g
g
We see that a times 2 equals a number that ends in zero. Since a can’t equal zero, a has to equal 5.