Addition And Subtraction Problems Worksheet Page 27
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40The first photographers had difficult
There are now many different types
jobs. They carried separate pieces
of cameras that are affordable.
of film in large metal containers.
Some cameras that scientists have
Each container was 12 inches wide
invented are used only once. There
and 16 inches long.
are many different kinds of these
cameras, including digital
Taking a picture was first a
disposable cameras.
chemical process. Today, taking
a picture is a digital process, too.
Digital cameras take pictures like
a television records images.
The digital
camera revolution
started in 1981.
78 Chapter 2 Solve Addition and Subtraction Problems
Jeff Rotman/Getty Images
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education