Addition And Subtraction Problems Worksheet
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40Solve Addition
2
and Subtraction
Problems
What is addition? What is
subtraction?
Addition is an operation on two or more numbers that tells
how many in all. Subtraction is an operation on two numbers
that tells how many are left when some are taken away.
Example
Celeste and her parents are painting a fence. The
fence has three sides. To find the total length of the fence,
use addition.
1
25
30
+ 25
25 ft
25 ft
80
The total length of
the fence is 80 feet.
30 ft
What will I learn in this chapter?
Use addition properties and subtraction rules.
■
Estimate sums and differences.
■
Determine when to estimate or find an exact answer.
■
Add and subtract whole numbers, including multi-digit
■
numbers.
Key Vocabulary
Commutative Property of Addition
Associative Property of Addition
estimate
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52 Chapter 2 Solve Addition and Subtraction Problems
The McGraw-Hill Companies/Glencoe McGraw-Hill
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