Page 80 - MarceAlgebra Demystified

CHAPTER 4 Negative Numbers 67

4: 5 þ 9 ¼ 4

5: 24 þ 54 ¼ 30

6: 6 þ 19 ¼ 13

7: 71 þ 11 ¼ 60

8. 40 þ 10 ¼ 30

9: 12 þ 18 ¼ 6
Returning to the test example, suppose you have gotten the first five correct
but missed the next two. Of course, your score would be 5 2 ¼ 3. Suppose
now that you missed more than five, your score would then become a nega-
tive number. If you missed the next seven problems, you will have lost credit
for all five you got correct plus another two: 5 7 ¼ 2. When subtracting
a larger positive number from a smaller positive number, take the difference
of the two numbers. The difference will be negative.

Examples

410 500 ¼ 90 10 72 ¼ 62
Be careful what you call these signs; a negative sign in front of a number
indicates that the number is smaller than zero. A minus sign between
two numbers indicates subtraction. In 3 5 ¼ 2, the sign in front of 5
is a minus sign and the sign in front of 2 is a negative sign. A minus sign
requires two quantities and a negative sign requires one quantity.

Practice

1: 28 30 ¼

2: 88 100 ¼

3: 25 110 ¼

4: 4 75 ¼

5: 5 90 ¼