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Math Chapter 1: Adding and subtracting

AB
When adding and subtracting you always start with theones place
The answer to an addition problem.sum
The answer to a subtraction problem.difference
to take apart a number to write it in a new wayregroup
A number close to an exact value.estimate
For any number, zero plus that number is the number.Identify Property of Addition
5,364 + 482 round to hundreds5,400 + 500 = 5,900
Sum of 212,048 and 37,251249,299
612- 430 =182
5,364 + 482 =5,846
The property that states that the order in which two numbers are added does not change the sum.Commutative Property of Addition
The property which states that the grouping of the addends does not change the sum.Associative Property of Addition
The first number is a subtraction sentence from which a second number is to be subtracted.minuend
The second number is a subtraction sentence that is subtracted from a number or minuend.subtrahend


Fourth Grade Teacher
Island School
Lemoore, CA

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