Page 44 - Basic College Mathematics with Early Integers

S E C T ION 1. 3 I ADDING WHOLE NUMBERS AND PERIMETER 21

a. Which country shown has the greatest number of endangered species?
b. Find the total number of endangered species for Australia, China, and India.

Solution:
a. The country with the greatest number of endangered species corresponds to
the tallest bar, which is Indonesia.
b. The key word here is “total.” To find the total number of endangered species
for Australia, China, and India, we add.
In Words Translate to Numbers

Australia → 64
China → 83
India → + 89
Total 236

The total number of endangered species for Australia, China, and India is 236.
Work Practice 8

Calculator Explorations Adding Numbers

To add numbers on a calculator, find the keys marked Use a calculator to add.
+ and = or ENTER . 1. 89 + 45 2. 76 + 97
For example, to add 5 and 7 on a calculator, press the keys
3. 285 + 55 4. 8773 + 652
5 + 7 = or ENTER .
5. 985 6. 465
The display will read 12 . 1210 9888
Thus, 5 + 7 = 12. 562 620
+ 77 + 1550
To add 687, 981, and 49 on a calculator, press the keys
687 + 981 + 49 = or ENTER .
The display will read 1717 .
Thus, 687 + 981 + 49 = 1717. (Although entering 687,
for example, requires pressing more than one key, here
numbers are grouped together for easier reading.)